A woman lights a candle in memory for victims of the college attack in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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A woman lights a candle in memory for victims of the college attack in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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People hug comforting each other as they mourn for victims of the college attack in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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People hug comforting each other as they mourn for victims of the college attack in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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A woman cries as she mourns for victims of the college attack in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Locals light candles in memory of victims of college attack in Kerchin, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Head of the Republic of Crimea Sergei Aksenov speaks to the media on a street in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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A woman lights a candle in memory of victims of college attack in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Head of the Republic of Crimea Sergei Aksenov speaks to the media on a street in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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A man lays flowers in memory of victims of Kerch college attack, in Simferopol, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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A woman lights a candle in memory of victims of Kerch college attack, in Simferopol, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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People light candles in memory of victims of Kerch college attack, in Simferopol, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Flowers for the memory of victims of the college attack lay at the WWII Kerch monument in Sevastopol, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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A man lights a candle in memory of victims of Kerch college attack, in Sevastopol, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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A man lights a candle in memory of victims of Kerch college attack, in Sevastopol, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Russian Orthodox priests read a prayer in memory of victims of Kerch college attack, in Sevastopol, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Russian Orthodox priests read a prayer in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Russian Orthodox priests read a prayer in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Russian Orthodox priest reads a prayer in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Russian Orthodox priest reads a prayer in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Russian Orthodox priest reads a prayer in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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A girl lights candles in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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People light candles in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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People light candles in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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A man lights candles in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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People light candles in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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People light candles in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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A girl lights a candle in memory of victims of Kerch college attack, in Krasnodar, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Police officers guard the entrance to a hospital in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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People queue at the entrance to a hospital in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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People lay flowers to the WWII Kerch monument as they mourn victims of the college attack, outside Moscow's Kremlin, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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People lay flowers to the WWII Kerch monument as they mourn victims of the college attack, outside Moscow's Kremlin, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Candles are lit at the WWII Kerch monument for the memory of victims of the college attack, outside Moscow's Kremlin, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Flowers for the memory of victims of the college attack lay at the WWII Kerch monument outside Moscow's Kremlin, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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A woman mourns for victims of the college attack at a WWII Kerch monument, outside Moscow's Kremlin, Russia, October 17, 2018. Earlier in the day the college in Crimea's city of Kerch was attacked and hit by an explosion caused by the detonation of an improvised explosive device.

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Armed Russian soldiers and police officers secure area around the college building in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day an unidentified explosive device filled with metal objects was detonated in the canteen of the college. A deadly blast that rocked the college in Crimea's Kerch is classified by investigators as a terrorist attack, the Russian Investigative Committee's spokeswoman said on Wednesday.

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In this video grab college director Olga Grebennikova speaks on a phone outside a building after the explosion in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day an unidentified explosive device filled with metal objects was detonated in the canteen of the college. A deadly blast that rocked the college in Crimea's Kerch is classified by investigators as a terrorist attack, the Russian Investigative Committee's spokeswoman said on Wednesday.

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In this video grab an ambulance arrives at a college building in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day an unidentified explosive device filled with metal objects was detonated in the canteen of the college. A deadly blast that rocked the college in Crimea's Kerch is classified by investigators as a terrorist attack, the Russian Investigative Committee's spokeswoman said on Wednesday.

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Russian police officers walk past ambulances outside a college building in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day an unidentified explosive device filled with metal objects was detonated in the canteen of the college. A deadly blast that rocked the college in Crimea's Kerch is classified by investigators as a terrorist attack, the Russian Investigative Committee's spokeswoman said on Wednesday.

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Volunteers and medical workers load an injured woman into a bus outside a college building in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day an unidentified explosive device filled with metal objects was detonated in the canteen of the college. A deadly blast that rocked the college in Crimea's Kerch is classified by investigators as a terrorist attack, the Russian Investigative Committee's spokeswoman said on Wednesday.

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Russian Emergency Situations Ministry workers and police officers walk outside a college building in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day an unidentified explosive device filled with metal objects was detonated in the canteen of the college. A deadly blast that rocked the college in Crimea's Kerch is classified by investigators as a terrorist attack, the Russian Investigative Committee's spokeswoman said on Wednesday.

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Medical workers treat injured people outside a college building in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day an unidentified explosive device filled with metal objects was detonated in the canteen of the college. A deadly blast that rocked the college in Crimea's Kerch is classified by investigators as a terrorist attack, the Russian Investigative Committee's spokeswoman said on Wednesday.

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In this video grab an ambulance arrives at a college building in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day an unidentified explosive device filled with metal objects was detonated in the canteen of the college. A deadly blast that rocked the college in Crimea's Kerch is classified by investigators as a terrorist attack, the Russian Investigative Committee's spokeswoman said on Wednesday.

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In this video grab medical workers and police officers walk outside a college building in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day an unidentified explosive device filled with metal objects was detonated in the canteen of the college. A deadly blast that rocked the college in Crimea's Kerch is classified by investigators as a terrorist attack, the Russian Investigative Committee's spokeswoman said on Wednesday.

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In this video grab Russian Emergency Situations Ministry workers stand outside a college building in Kerch, Crimea, Russia, October 17, 2018. Earlier in the day an unidentified explosive device filled with metal objects was detonated in the canteen of the college. A deadly blast that rocked the college in Crimea's Kerch is classified by investigators as a terrorist attack, the Russian Investigative Committee's spokeswoman said on Wednesday.

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