Provocations involving the use of chemical weapons are being prepared by militants in the Syrian province of Idlib, stated Russian President Vladimir Putin in Tehran on Friday, while speaking at a meeting with Iranian President Hassan Rouhani and his Turkish counterpart Recep Tayyip Erdogan. «The remaining groups of extremists are currently concentrated in the de-escalation zone in the province... Еще of Idlib. Terrorists are making attempts to disrupt the ceasefire, moreover, they are carrying out and preparing various kinds of provocations, including the use of chemical weapons,» Putin said. Leaders of Russia, Iran and Turkey arrived in Tehran to hold trilateral talks on international issues, trilateral cooperation, as well as recent developments in Syria. The meeting is part of the Astana Peace Process for the Syrian crisis.