Russian Special Presidential Envoy for Syria Alexander Lavrentyev, second left, speaks listens to the speakers during talks on Syria in Astana, Kazakhstan, November 29, 2018. Three guarantor states of the Astana format talks on Syria — namely Iran, Russia and Turkey — have urged the Organization for the Prohibition of Chemical Weapons to investigate all reports related to the use of chemical weapons in Syria.

29.11.2018#5715484

Kazakh Foreign Minister Kairat Abdrakhmanov, centre, speaks during talks on Syria in Astana, Kazakhstan, November 29, 2018. Three guarantor states of the Astana format talks on Syria — namely Iran, Russia and Turkey — have urged the Organization for the Prohibition of Chemical Weapons to investigate all reports related to the use of chemical weapons in Syria.

29.11.2018#5715473

The glasses and the notebook of a participant are left on the table during talks on Syria in Astana, Kazakhstan, November 29, 2018. Three guarantor states of the Astana format talks on Syria — namely Iran, Russia and Turkey — have urged the Organization for the Prohibition of Chemical Weapons to investigate all reports related to the use of chemical weapons in Syria.

29.11.2018#5715470

Kazakh Foreign Minister Kairat Abdrakhmanov, centre, speaks during talks on Syria in Astana, Kazakhstan, November 29, 2018. Three guarantor states of the Astana format talks on Syria — namely Iran, Russia and Turkey — have urged the Organization for the Prohibition of Chemical Weapons to investigate all reports related to the use of chemical weapons in Syria.

29.11.2018#5715461

Russian Special Presidential Envoy for Syria Alexander Lavrentyev, second left, speaks to Kazakh Foreign Minister Kairat Abdrakhmanov, right, during talks on Syria in Astana, Kazakhstan, November 29, 2018. Three guarantor states of the Astana format talks on Syria — namely Iran, Russia and Turkey — have urged the Organization for the Prohibition of Chemical Weapons to investigate all reports related to the use of chemical weapons in Syria.

29.11.2018#5715435

Kazakh Foreign Minister Kairat Abdrakhmanov, centre, speaks during talks on Syria in Astana, Kazakhstan, November 29, 2018. Three guarantor states of the Astana format talks on Syria — namely Iran, Russia and Turkey — have urged the Organization for the Prohibition of Chemical Weapons to investigate all reports related to the use of chemical weapons in Syria.

29.11.2018#5715406

United Nations Special Envoy for Syria Staffan de Mistura, centre, attends talks on Syria in Astana, Kazakhstan, November 29, 2018. Three guarantor states of the Astana format talks on Syria — namely Iran, Russia and Turkey — have urged the Organization for the Prohibition of Chemical Weapons to investigate all reports related to the use of chemical weapons in Syria.

28.11.2018#5715403

United Nations Special Envoy for Syria Staffan de Mistura attends talks on Syria in Astana, Kazakhstan, November 29, 2018. Three guarantor states of the Astana format talks on Syria — namely Iran, Russia and Turkey — have urged the Organization for the Prohibition of Chemical Weapons to investigate all reports related to the use of chemical weapons in Syria.

29.11.2018#5715398