Egypt President Sisi condemns 'inhuman criminal killers'
A video has emerged showing the beheadings purportedly of 21 Egyptian Christians who had been kidnapped by Islamic State (IS) militants in Libya.
The footage shows a group wearing orange overalls, being forced to the ground and then decapitated.
Speaking on national television, President Abdel Fattah al-Sisi said Egypt reserved the right to respond in any way it saw fit - and he condemned the ''inhuman criminal killers''.