Three Americans killed by IS gunman in Syria, US military says

Two US soldiers and a US civilian interpreter have been killed in Syria in an ambush by an Islamic State gunman, the US Central Command has said.

Officials said three other service members were injured in the attack, during which the gunman was "engaged and killed".

US President Donald Trump wrote on social media that it was "an ISIS attack" against the US and Syria and said there would be "a very serious retaliation".

The identities of those killed are being withheld for 24 hours until their next of kin have been informed, the US Central Command said.

In a post on X, the US Central Command said the attack was "the result of an ambush by a lone ISIS gunman", while a Pentagon official said initial assessments showed the attack was "likely" to be carried out by the Islamic State group.

The UK-based Syrian Observatory for Human Rights said the attacker was a member of the Syrian security force.

No group has claimed responsibility for the attack, and the identity of the gunman has not been released.

The ambush occurred in Palmyra, located in the centre of the country, while the soldiers were "conducting a key leader engagement", according to Pentagon spokesperson Sean Parnell.

A Pentagon official said: "This attack took place in an area where the Syrian president does not have control."

Trump added that the three injured US soldiers were "doing well".