officials say they believe Iran was behind the drone attack last week at the military outpost in southern Syria where American troops are based.

believes that Iran resourced and encouraged the attack, but that the drones were not launched from Iran.

They were Iranian drones, and Iran appears to have facilitated their use, officials said, speaking on condition of anonymity to discuss details that have not been made public.

Officials said they believe the attacks involved as many as five drones laden with explosive charges, and that they hit both the U.S.

and coalition troops are based at al-Tanf to train Syrian forces on patrols to counter Islamic State militants.

The Biden administration this week said international diplomatic efforts to get Iran back into negotiations to return to a 2015 nuclear deal were at a “critical place” and that patience Is wearing thin.

forces was in January 2020, when Tehran launched a barrage of ballistic missiles on al-Asad air base in Iraq.