Islamic State has released a video Sunday claiming to show the nine Paris attackers in their controlled region of Iraq and Syria before they killed 130 people last year on November 13 in the French capital.
The militant group has threatened too in the new 17-minute video to attack United Kingdom, showing footage of major London sites, Prime Minister David Cameron, and Speaker of the House of Commons John Bercow.
The nine attackers shown in the footage also include Bilal Hadfi, Samy Amimour and suspected ringleader Abdelhamid Abaaoud having committed atrocities and were trained in the ISIS-held territory.
Abaaoud was killed by French police on November 18, after the Paris citywide attack, in a shootout at an apartment in St Denis.
Some of the attackers were French and Belgian nationals. Several of them were speaking in French but with inflections that are typical among north African immigrant communities.
Haidi is seen in his 20s beheading a man. He along with two others had attacked the Stade de France on November 13.
Amimour, 28, was one of the attackers in Bataclan. His father tried bringing him back from Syria knowing he has become their fighter.
Omar Ismal Mostefai seen in the video was the Bataclan attacker who had detonated his vest inside the concert hall. He was 29.
The video has been filmed in similar topography near Raqqa in Syria that were seen in previous propaganda videos of the group.
UK government spokesman said they are presently examining the new video.