Three suicide drones on Friday morning attacked a U.S. base in Syria, leaving two Syrian fighters injured.
U.S. Central Command (CENTCOM) said in a release that forces at the al-Tanf Garrison shot down two of the drones, but one was able to strike the compound.
No American troops were injured in the attack.
The two fighters injured were members of a U.S. partner force, the Syrian Free Army, according to CENTCOM.
Joe Buccino, a CENTCOM spokesperson, said “attacks of this kind are unacceptable.”
“They place our troops and our partners at risk and jeopardize the fight against ISIS,” Buccino said in a statement.
Watch live: White House press briefing
‘Concerning’ strain of gonorrhea detected in Massachusetts, officials say
The al-Tanf Garrison is located in Syria near the border with Iraq and Jordan.
U.S. troops have used the base to launch counterterrorism operations against ISIS and train Syrian opposition fighters since 2016.
In August, another drone strike hit the garrison but did not cause any injuries or damage to the outpost.