Gaza’s Hamas-run police force said Thursday that it killed 12 members of the Israeli-backed Abu Shabab militia in Gaza, which said its fighters had killed five Hamas operatives but made no mention of its own casualties.

According to Hamas, the Abu Shabab gunmen were killed early Wednesday by the Gaza police’s Sahm unit, which Hamas says was established to combat looting. The unit released video footage showing several dead men lying in the street, saying they were Abu Shabab fighters who had been detained and killed for collaborating with Israel. It was not possible to verify the images or the claims around them.

Abu Shabab has been operating in an Israeli-controlled area of southern Gaza’s Rafah. Israel confirmed last week that it was arming the militia to bolster opposition to Hamas.