A civilian was killed by a UK airstrike targeting Islamic State in Syria, the Ministry of Defence has confirmed.
It is the first time the MoD has confirmed a civilian casualty during the UK's campaign against the terror group in Iraq and Syria.
Defence Secretary Gavin Williamson described the 'unintentional civilian fatality' on 26 March as 'deeply regrettable'.
The RAF had targeted three IS fighters in eastern Syria when a civilian motorbike 'crossed into the strike area at the last moment', he said.
'These events serve to remind us of the consequences of conflict and of the heavy price that the people of Syria have paid.
'It reminds us that when we undertake military action, we must do so knowing that it can never be completely without risk.
'Such incidents will not weaken our resolve to defeat Daesh (IS) and rid the world of its poisonous ideology of hate and intolerance.'
The MoD said an RAF Reaper drone had tracked a group of terrorists in a vehicle in the Syrian Euphrates valley and 'successfully destroyed it and its occupants with a precision Hellfire missile attack'.
It concluded that a civilian had been killed following 'detailed post-strike analysis' of the airstrike, Mr Williamson said.
