On Monday, a suspected Syrian army strike hit near a Turkish military convoy heading to an observation post near Idlib's Khan Sheikhoun. Damascus denounced what it said was a Turkish attempt to save routed rebels.

Speaking to reporters after a cabinet meeting, Kalin said President Tayyip Erdogan would hold phone calls with Russian President Vladimir Putin and US President Donald Trump in the coming days to discuss developments in Syria.

He said a schedule agreed upon with the United State for the planned safe zone in the east of the Euphrates in Syria will be gradually implemented in the coming weeks, adding that Turkish and US troops will begin joint patrols in the region soon.

In Washington, the Pentagon said US Defense Secretary Mark Esper spoke with his Turkish counterpart on Wednesday and that the security mechanism in northeast Syria would be executed in "designated phases."

Esper and Turkish Defense Minister Hulusi Akar "confirmed their intent to take immediate, coordinated steps to implement the framework as demonstrated by standing up the Joint Coordination Center in Turkey," the Pentagon statement said.