The US government has released the names of three troops killed by an enemy drone attack in Jordan on Sunday.
The US has blamed Iranian-backed groups and the Pentagon said it carried the “footprints” of Kataib Hezbollah.
The Pentagon also reiterated the US does not want a war with Iran.
“We don’t seek war, but we will take action, and respond to attacks on our forces,” said Pentagon spokesperson Sabrina Singh.
CBS News, the BBC’s US partner, said it was told by a US official that the drone used in the attack appeared to be Iranian-made.
The official indicated it was a “type of Shahed drone,” which is a one-way attack drone Iran has been providing to Russia.
Iran has denied US and British accusations that it supported militant groups blamed for the strike.
The Pentagon said the three soldiers killed on Sunday morning came from an army reserve unit based in Fort Moore, in the state of Georgia.
Lt Gen Jody Daniels, Chief of Army Reserve and Commanding General US Army Reserve Command, paid tribute to the fallen soldiers.
“On behalf of the Army Reserve, I share in the sorrow felt by their friends, family, and loved ones. Their service and sacrifice will not be forgotten, and we are committed to supporting those left behind in the wake of this tragedy”, said Gen Daniels.
The drone attack took place in Rukban, north-eastern Jordan, near the Syrian border. The base was later named by US officials as Tower 22.