ISIS has released a video showing an ambush in Niger in which four US soldiers were killed last October.
The video consists mainly of raw footage, including images apparently filmed using a helmet camera belonging to one of the soldiers.
The film begins with still images showing a pledge of allegiance to ISIS leader Abu Bakr al-Baghdadi by members of the Sahel-based group Jamaat Nusrat al-Islam wal-Muslimin (JNIM).
JNIM was formed from a number of West African jihadist groups in March 2017, and originally had pledged allegiance to al-Qaeda.
The graphic video shows several armed fighters walking and running in a desert area, apparently heading for the ambush.
The soldiers are seen driving away in a white vehicle, with coloured smoke grenades providing cover.
After a cut in the video, the US soldiers are seen around another vehicle, with one soldier driving and the other two walking beside while seemingly firing at their attackers.
Then, one of the soldiers drops to the ground. The man wearing the helmet camera tries to raise the fallen man.
The soldier driving the vehicle jumps out and helps drag the soldier to cover, before he and the camera-wearer run into the scrub.
While running, the soldier wearing the camera falls to the ground. The footage ends with the camera unmoving, and militants surrounding the soldier, firing at point blank range.
The US has about 800 troops in Niger, which they say are there to help train local forces and support counter-terrorism efforts.
This was the first time US troops were killed in combat in Niger.