Russian Foreign Minister Sergei Lavrov, right, and his German counterpart Frank-Walter Steinmeier meet as part of a session of the Council of Europe Committee of Ministers, Vienna.

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Russian Foreign Minister Sergei Lavrov, right, and his German counterpart Frank-Walter Steinmeier meet as part of a session of the Council of Europe Committee of Ministers, Vienna.

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Russian Foreign Minister Sergei Lavrov during a session of the Council of Europe Committee of Ministers, Vienna.

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Russian Foreign Minister Sergei Lavrov, right, and Didier Burkhalter, President of Switzerland, OSCE Acting Chairman, left, meet as part of a session of the Council of Europe Committee of Ministers.

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Russian Foreign Minister Sergei Lavrov, right, and his Serbian counterpart Ivica Dačić, left, meet as part of a session of the Council of Europe Committee of Ministers.

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Russian Foreign Minister Sergei Lavrov at a session of the Council of Europe Committee of Ministers.

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From left: Secretary General of the Council of Europe Thorbjorn Jagland, Russian Foreign Minister Sergei Lavrov, right, and his Austrian counterpart Sebastian Kurz meet as part of a session of the Council of Europe Committee of Ministers, Vienna.

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From left: Russian Minister of Foreign Affairs Sergei Lavrov and Austrian Minister of Foreign Affairs and Integration Sebastian Kurz meet in Vienna during Lavrov's visit to Austria.

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From left: Russian Minister of Foreign Affairs Sergei Lavrov and Austrian Minister of Foreign Affairs and Integration Sebastian Kurz meet in Vienna during Lavrov's visit to Austria.

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