RAF Tornado jets have carried out the first British bombing runs over Syria, the Ministry of Defence has confirmed.
The air strikes were carried out within hours of a vote by MPs in the Commons to back extending operations against Islamic State (IS) from neighbouring Iraq.
Four RAF Tornado jets, which carry a range of munitions including Paveway IV guided bombs and precision-guided Brimstone missiles, took off from the Akrotiri base in Cyprus but defence officials refused to be drawn on the targets of their mission.
A Ministry of Defence spokesman said the sorties had returned from the "first offensive operation over Syria and have conducted strikes".
Prime Minister David Cameron has said MPs took the "right decision to keep the UK safe" after they overwhelmingly backed air strikes.