ISTANBUL, Sept. 25 (Xinhua) -- Turkish President Recep Tayyip Erdogan and his Russian counterpart Vladimir Putin spoke over the phone on Monday, stressing territorial integrity of both Iraq and Syria, according to Turkish presidential sources.
The two leaders also exchanged views on the Astana process seeking to bring peace to Syria, in which Russia, Turkey and Iran have agreed to create four de-escalation zones in the war-torn country, the sources said.
The two leaders decided to discuss the issues in detail during Putin's visit to Ankara on Thursday, said the sources.