“This was an ISIS attack against the US, and Syria, in a very dangerous part of Syria, that is not fully controlled by them,” Trump said on Truth Social. “There will be very serious retaliation.”

Three other US personnel were wounded in the attack in Palmyra, Sean Parnell, the Pentagon’s chief spokesperson said on X. The attack occurred as the soldiers “were conducting a key leader engagement” in “support of ongoing counter-ISIS operations,” he said.

“This attack is currently under active investigation,” Parnell said.

US Central Command said the attack was an ambush by “a lone ISIS gunman” and that the gunman was engaged and killed.

A Pentagon official told NBC News the attack occurred in an area outside the control of Syria’s self-proclaimed president, Ahmed al-Sharaa.

Defense Secretary Pete Hegseth said in a separate X post that the person who carried out the attack was killed by US partner forces. He did not provide additional details about the perpetrator of the forces involved.

MNA