ISIS have executed 11 hostages as part of their campaign to 'avenge' the killing of the terror group's leader Abu Bakr al-Baghdadi.
The killings took place in Nigeria and saw 11 Christians beheaded - all believed to be male.
IS said the victims were "captured in the past weeks" in Nigeria's north-eastern Borno State.
They released a 56-second video yesterday - produced by the group's 'news agency', Amaq.
Analysts say it was clearly timed to coincide with Christmas celebrations.
It was filmed at an unidentified outdoor area.
One captive in the middle is shot dead while the other 10 are pushed to the ground and beheaded, reports the BBC.
ISIS leader Abu Bakr al-Baghdadi was killed in a raid on his Syrian home, led by US Special Forces.
SAS troops also took part in the mission to hunt down and kill Islamic State commander.
Al-Baghdadi is said to have fled into a tunnel before setting off an explosive vest, killing himself and three of his young children.
A US AC 130 “flying gun” and Reaper drone armed with 500lb bombs then flattened the den after the troops had withdrawn.
He had posed as a wealthy family man who had made his fortune as a cloth merchant while he hid out in Syria.
People in Barisha, a village in North Westof the country, had no idea they were living next to the Islamic State leader until US forces attacked his home and Baghdadi blew himself up.
The location of Baghdadi’s lair has surprised many counter-terror experts because it lies just 20 miles from the border with Turkey.
It bears some similarity to the way in which al-Qaeda chief Osama bin Laden hid out in a large compound in a military area of Pakistan before being killed in a US special forces raid in 2011.
