The US has vowed a “very consequential response” to a drone attack on a base in Jordan that killed three American troops.

President Joe Biden has blamed Iran-backed militants.

American troops were still in their sleeping quarters when the drone struck with little to no warning.

The drone arrived at the same time as a returning US drone – and as a result elements of the defence system were turned off, an official said.

Iran denies that it was behind the attack, calling the accusations “baseless” and saying it was “not involved in the decision making of resistance groups”.

Now, there is mounting pressure on Biden to choose the right response.

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