Three U.S. troops killed, dozens injured in drone strike by Iran-backed militia

President Joe Biden blamed Iran-backed militias for the first U.S. fatalities after months of strikes by the groups against American forces across the Middle East

Three American troops were killed and dozens were injured Sunday in a drone strike in northeast Jordan near the Syrian border, the U.S. military said. President Joe Biden blamed Iran-backed militias for the first U.S. fatalities after months of strikes by the groups against American forces across the Middle East amid the Israel-Hamas war.

With an increasing risk of military escalation in the region, U.S. officials were working to conclusively identify the precise group responsible for the attack, but they have assessed that one of several Iranian-backed groups was behind it.

Biden said the United States “will hold all those responsible to account at a time and in a manner (of) our choosing.” Defense Secretary Lloyd Austin said “we will take all necessary actions to defend the United States, our troops, and our interests.”

Iran-backed fighters in east Syria began evacuating their posts, fearing U.S. airstrikes, according to Omar Abu Layla, a Europe-based activist who heads the Deir Ezzor 24 media outlet. He told The Associated Press that the areas are the strongholds of Mayadeen and Boukamal.

According to a U.S. official, the number of troops injured in the attack by the one-way attack drone rose to at least 34. Another official, who also spoke on condition of anonymity to discuss details not made public, said a large drone struck the base, which two other American officials identified as an installation in Jordan known as Tower 22. It is along the Syrian border and is used largely by troops involved in the advise-and-assist mission for Jordanian forces.

The small installation, which Jordan does not publicly disclose, includes U.S. engineering, aviation, logistics and security troops. Defense Secretary Lloyd Austin said the troops were deployed there “to work for the lasting defeat of ISIS.” Three officials said the drone struck near the troops’ sleeping quarters, which they said explained the high casualty count.

The U.S. military base at al-Tanf in Syria is just 20 kilometers (12 miles) north of Tower 22. The Jordanian installation provides a critical logistical hub for U.S. forces in Syria, including those at al-Tanf, which is near the intersection of the Iraq, Syria and Jordan borders.

Jordanian state television quoted Muhannad Mubaidin, a government spokesman, as insisting the attack happened across the border in Syria.