Ciudad Juarez, Chih - Four people were killed in a second multiple slaying early Monday at the Bandoleros nightclub in Juárez, officials said.
Early reports indicate the victims included three men and a woman, and possibly one of them was a state police officer.
In addition to those killed, more than half a dozen people were injured when an armed commando opened fire on the crowd at the club.
Bandoleros, on the Panamerican Highway, in the the south end of the city, had been a popular dance club of El Pasoans for many years.
Police are investigating the multiple homicide that comes on the heels of Saturday's massacre in a southeastern neighborhood which claimed 16 lives.