President Tayyip Erdogan said on Saturday Turkey would press on with its offensive into northeastern Syria and "crush the heads of terrorists" if a deal with Washington on the withdrawal of Kurdish fighters from the area was not fully implemented.

Erdogan agreed on Thursday in talks with U.S. Vice President Mike Pence a five-day pause in the offensive to allow time for the Kurdish fighters to withdraw from a "safe zone" Turkey aims to establish in northeast Syria near the Turkish border.

On Saturday the fragile truce was holding along the border, with just a few Turkish military vehicles crossing the border, Reuters journalists at the scene said. In the last 36 hours, there have been 14 "provocative attacks" from Syria, Turkey's defence ministry said, adding it was continuing to coordinate closely with Washington on implementation of the accord.

If the agreement with the United States, a NATO ally, for the Syrian Kurdish YPG militia to withdraw falters, Turkey will continue its military operation from where it left off, Erdogan said.

- (Reuters)