A video has emerged that appears to show members of the Egyptian military shooting unarmed detainees to death at point-blank range in the Sinai Peninsula and staging the killings to look as if they had happened in combat.

The leaked video, which was posted on social media on Thursday, could undercut claims made by the Egyptian Army in December that the men were suspected terrorists who died in a fight with the military.

The video was released the same day that Defense Secretary Jim Mattis met in Egypt with its president, Abdel Fattah el-Sisi, to discuss improving their countries’ military relationship. It also comes after human rights groups accused the Egyptian military of killing up to 10 men in January in a staged counterterrorism raid in Sinai.

The three-minute video, which was released through a channel associated with the Muslim Brotherhood, appears to depict part of a raid that the Egyptian Army highlighted in a Facebook post on Dec. 6, 2016. That post included photos of three bloody men in a grassy area with rifles next to them. The post said they had been killed in a military raid on a terrorist base and an explosives storehouse.