Michoacan Attorney General Placido Torres says the officers were patrolling in the town of Tancitaro when gunmen kidnapped them yesterday. Colleagues found their bodies in the neighbouring town of Buenavista Tomatlan.
Torres says investigators haven't determined a motive in the killings but the two towns have been overridden by drug traffickers and community self-defence squads.
Meanwhile, prosecutors in northern Chihuahua state say gunmen late Monday killed five members of a family while they were travelling in a pickup truck in the town of Guadalupe y Calvo.