The United States military base at Al-Tanf in Syria was targeted with a “deliberate and coordinated” on Wednesday at approximately 7 p.m., according to the U.S. Central Command (CENTCOM). The base was hit by drones and indirect mortar and rocket fire. There were no casualties among the U.S. troops stationed at the base.

The identity of the attackers is not yet known. However, Iranian proxy militias, run by the Islamic Revolutionary Guard Corps and the Quds Force, are located in the area. They have frequently attacked the U.S. troops both in Iraq and Syria. 

A battle damage assessment is ongoing at the base.

“All U.S. personnel have been accounted for… We maintain the inherent right of self-defense and will respond at a time and place of our choosing,” Captain Bill Urban, the spokesman for CENTCOM, said in a statement.