Five U.S. service members and a contractor were injured in the drone attack.

By Luis Martinez @ ABCNews.com, March 23, 2023, 11:59 PM

The U.S. military conducted retaliatory airstrikes in eastern Syria on Thursday against Iranian-backed groups after a drone strike targeting a U.S. base in the region killed a U.S. contractor and injured six others, including five U.S. service members, the Pentagon said.

"Earlier today, a U.S. contractor was killed and five U.S. service members and one additional U.S. contractor were wounded after a one-way unmanned aerial vehicle struck a maintenance facility on a Coalition base near Hasakah in northeast Syria at approximately 1:38 p.m. local time," the Pentagon said in a statement.

Two of the wounded service members were treated on site, while the other four Americans were medically evacuated to Coalition medical facilities in Iraq, officials said. A U.S. official confirmed to ABC News that both contractors were American.

U.S. intelligence assessed that the one-way attack drone that struck the base was Iranian in origin, according to the statement. [....]