(KUNA) -- Algerian security forces killed four nationals believed to be members of an outlawed armed group, active in the northeast of the capital Algiers, a security source said Saturday. The source said in press remarks the security forces stoped a car in Mshonesh area, 530 kilometers northeast of Algiers, which was boarded by the armed elements. One of the gunman opened fire at the forces and injured one of them. The government forces retaliated and killed all four gunmen inside the car, said the source.A Kalashnikov, a pistol, a hand grenade and ammunition were seized from the car, said the source.