City spokesman Manuel del Castillo says two other officers are wounded. He says the officers were attacked Wednesday night during a gathering at the house of a female police officer who is among the dead.
The city's 2,500 police officers were ordered to stay in hotels in February after attackers killed five officers and then messages signed by the New Juarez Cartel appeared threatening to kill an officer a day unless the police chief resigned.
Officers were allowed to return home Tuesday.
Juarez is across the border from El Paso, Texas.