U.S. Defense Secretary Mark Esper says Washington is considering keeping some U.S. troops in northeastern Syria to help safeguard oil supplies from Islamic State militants.
Following President Trump's decision to withdraw U.S. troops from Syria, more than 100 U.S. vehicles crossed the border into Iraq early on Monday, local time.
This comes after Turkey agreed to pause its offensive for five days under a truce with Washington.
Esper told reporters during his trip to Afghanistan that some troops were still partner forces near oilfields and there had been discussions about keeping some of them there.
But he said nothing has been decided yet as the Pentagon is still looking for options.