At least five people have been shot to death in the Mexican northern border city of Ciudad Juarez, according to state prosecutors.

Arturo Sandoval, a spokesman for the Chihuahua state prosecutors' office, said Monday that the victims ranged in age from 25 to 30 in the attack at Gabino's bar.

Prosecutors have not established a motive for the killings, the Associated Press reported.

Ciudad Juarez has been named the country's deadliest city, with more than 1,700 killings so far this year linked to drug-related violence.

Also on Monday, gunmen killed two state police officers in the city of Iguala in the southern state of Guerrero, the state public security office said in a statement.

The officers were killed inside a command post. It is unclear what motivated the attack.

AGB/SC/DT