According to Nigerian police, gunmen have killed at least 12 people and seized dozens of cattle in the north-eastern state of Taraba
Residents claimed that during the invasion of the isolated town of Mubizen, some of the attackers were dressed as local security guards.
They pretended to be searching for fleeing armed criminals and asked members of the community to come out and help with the search.
But the attackers then opened fire on the crowd.
Four people have been arrested in connection with the raid.
Nigeria is grappling with a wave of violence by armed criminal gangs as well as Islamist insurgents.