U.S. troops in Syria were targeted Thursday with a “deliberate and coordinated” drone attack, military officials told Fox News, saying that the U.S. has the “inherent right of self defense” and will “respond at a time and place of our choosing.”

Spokesman for U.S. Central Command Capt. Bill Urban confirmed that the al-Tanf Garrison area “was subjected to a deliberate and coordinated attack.”

“Based on initial reports, the attack utilized both unmanned aerial systems and indirect fire,” Urban said. “All U.S. personnel have been accounted for, and we are not aware of any injuries to U.S. personnel at this time.”

Urban added that U.S. Central Command is continuing to “work with our partners to confirm whether they suffered any casualties as a result of the deliberate attack.”