Russian President Vladimir Putin, Turkish President Recep Tayyip Erdogan and Iranian President Hassan Rouhani are due to hold talks on Syria in Ankara on Monday MOSCOW: Russia has asked Iran to refrain from any action that could jeopardise saving its troubled nuclear pact after Washington pulled out if it, Yuri Ushakov, a senior Kremlin aide, said on Friday. Ushakov added that the leaders of Russia, Turkey and Iran will discuss the difficult situation in Syria"s Idlib province when they meet in Ankara early next week for a summit. Russian President Vladimir Putin, Turkish President Recep Tayyip Erdogan and Iranian President Hassan Rouhani are due to hold talks on Syria in Ankara on Monday.