Revealing the agenda of the seventh meeting of High-level Russian-Turkish Cooperation Council at a news conference in Moscow, Presidential Aide Yury Ushakov said: "Much attention will be given to international affairs and military cooperation, also here is a famous topic other questions concerning military exchange."

Ushakov confirmed that Russia would accelerate the delivery of S-400 at the request of Turkey.

"Necessary efforts will be made from our side to satisfy the request of the Turkish side," he said.

He added that delivery of Turkish tomatoes to Russia would also likely be among topics on the agenda of Erdogan and Putin meeting.

About Turkish Stream pipeline construction, Ushakov said: "it is progressing on schedule".

Regarding the upcoming trilateral summit in the Turkish capital Ankara, the presidential aide said Turkish, Russian and Iranian leaders are expected to make a joint statement.

In this statement, they will point out their support to the sovereignty, independence and territorial integrity of Syria, he added.

"Presidents are suggested to synchronize watches regarding the implementation of the UN resolution 2401 regarding nationwide cease-fire and improvement of the humanitarian situation in this country," he said.

"The heads of states will assess the current situation, additional steps could be taken to strengthen cease-fire and to ensure the functioning of the de-escalation zones."