Three US troops have been killed and dozens injured in a drone attack on a US base near Jordan’s border with Syria.
US President Joe Biden said the attack was carried out by "radical Iran-backed militant groups". He added: "We shall respond."
It is the first time that a strike has killed US troops in the region since Hamas’s 7 October attack on Israel. It is not clear who is behind the attack.
President Biden said the US "will hold all those responsible to account at a time and in a manner of our choosing".
Reeta Chakrabarti presents BBC News at Ten reporting by Paul Adams, Gary O’Donoghue and Lyse Doucet.
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