ANKARA, Dec. 23 (Xinhua) -- Turkish President Recep Tayyip Erdogan and his U.S. counterpart Donald Trump on Sunday discussed Syria issues in phone conversation amid the U.S. ground force pulling out from Syria.

According to a statement released by the Turkish presidency, Erdogan and Trump agreed to ensure diplomatic and military coordination to prevent an authority vacuum following the U.S. withdrawal from Syria.

Erdogan also expressed satisfaction with steps taken by Washington regarding combating terrorism in Syria, saying Turkey was ready to provide any type of support.

Erdogan said in a tweet after the talk that both the leaders agreed to increase coordination on many issues, including trade relations and the developments in Syria.

On Wednesday, Washington announced to withdraw its troops from Syria after claiming a victory in the fight against the Islamic State (IS) without revealing any detailed timetable.

Following the U.S. move, Erdogan said Friday that Turkey had decided to postpone its cross-border operation into areas controlled by the Kurdish militia in northern Syria.