Attack hits Syria base that houses U.S. troops

WASHINGTON — A military outpost in southern Syria was hit by a coordinated attack on Wednesday, but a U.S. official said no American troops stationed there were injured or killed.

The official said the attack appeared to include at least one drone strike and possibly groundfire. It was not yet clear who carried out the attack.

U.S. and coalition troops are based at the al-Tanf garrison to train local Syrian opposition forces on patrols to counter Islamic State militants.