The US has launched airstrikes on 85 targets in Syria and Iraq in response to a drone attack on a US military base that killed three soldiers.
The US says its forces conducted airstrikes against Iran’s Islamic Revolutionary Guards Corp Quds Force and affiliated militia groups, attacking command and control centres.
Officials said the US is planning military action over a number of days against targets in Iraq and Syria.
Three US soldiers were killed and more than 40 personnel injured in a drone attack at a US base called Tower 22. The White House has blamed Iran and had promised to retaliate.
Iran has denied involvement in the drone attack calling the accusations "baseless”. it said it was "not involved in the decision-making of resistance groups”.
Jane Hill presents BBC News at Ten reporting by Orla Guerin in northern Iraq.
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