No decision on who carries out an operation to capture Syria's Daesh stronghold of Raqqa has yet been made, Turkish President Tayyip Erdoğan's spokesman said on Thursday.
"Our plan is very clear, but the negotiation process is going on," Ibrahim Kalın said, referring to a trilateral meeting between U.S., Russia and Turkey military chiefs this week.
"There is no final decision on by whom and how the offensive on Raqqa will be carried out. Kurdish militants should move out of Syria's Manbij to the east of the Euphrates (river) as we were promised," Kalın told reporters in Ankara.
Some European countries were working for the rejection of constitutional changes in Turkey's April's referendum and voiced concern about what it called rising Islamophobia and racism in Europe, Kalın said.
In a news conference, spokesman Ibrahim Kalin separately said the U.S., Turkish and Russian military chiefs had discussed a coordination mechanism for operations in Syria at a meeting in the southern Turkish province of Antalya this week.
Kalın echoed German Chancellor Angela Merkel's comments that the two countries shared deep-seated differences, saying differences between Turkey and Germany included the fight against terrorism, adding that Kurdish militants roamed freely in Germany.
Tensions have been running high between the two NATO allies after the arrest of a German-Turkish journalist in Turkey and the cancellation of rallies by Turkish ministers aimed at drumming up support for an April 16 referendum to expand Erdogan's powers.
