US drone attack: What is Tower 22 and why are US troops in Jordan.

An Iran-backed militia group has said it was responsible for a drone strike at a US military base in Jordan that killed three American troops.

At least 34 other service members were injured in the attack at the base, known as Tower 22. The White House blamed Iran and vowed a "very consequential response".

But Iran called the accusation "baseless" and said it was "not involved in the decision-making of resistance groups".

US officials have sought for weeks to prevent high tensions on several fronts in the region from boiling over into a wider war.

But Sunday marked the first time US soldiers had been killed by enemy fire in the region since Hamas's 7 October attack on Israel.