Turkey and Russia have agreed to a cease-fire plan for all of Syria that was expected to come into force at mid-night Wednesday, Turkish state media said on Wednesday, as Ankara and Moscow tighten cooperation to find an end to the civil war.

The plan was to expand to the whole country a cease-fire that was brokered by Turkey and Russia earlier this month in the city of Aleppo to allow for the evacuation of civilians, the state-run Anadolu news agency said.

But in a speech in Ankara following the report, Turkish President Recep Tayyip Erdogan made no reference to the plan, while Kremlin spokesman Dmitry Peskov said he could not answer questions on an issue "about which I don't have enough information".