A video posted online early Sunday purports to show Amedy Coulibaly, who was killed after taking hostages in a Paris supermarket Friday, pledging allegiance to the Islamic State group, according to media reports.

The SITE Intelligence Group said it had verified the video, which shows the man believed to be Coulibaly with a gun, wearing what appears to be combat gear and talking at length. However, there has been no official verification of the video from either the French or the American governments.

The man in the video says, “What we are doing is completely legitimate, given what they are doing. You cannot attack and not expect retribution, so you are playing the victim as if you don’t understand what’s happening,” according to a translation by the Associated Press.

Text playing over the video confirms Coulibaly killed a policewoman in southern Paris Thursday and attacked a kosher supermarket in the city the following day, Sky News reported.

Questioned whether he has any link to the Charlie Hebdo killers, Cherif Kouachi and Said Kouachi, the man in the video says, “The brothers of our team were split into two groups. ... I went out a bit against the police,” according to the Telegraph. “If we did things a bit together and a bit separately, it was to have more impact,” he added. In the video, he also pledges allegiance to the militant group formerly known as either ISIL or ISIS, BBC News reported.

French investigators are now focused on finding Coulibaly’s partner, Hayat Boumeddiene, who is also suspected of involvement in the attacks. She is believed to have already fled France, reportedly traveling to Syria.

This is a developing story: Check back for updates.