Mexican police say they have found three severed heads in plastic bags in the Pacific coast resort of Acapulco.
The Guerrero state Public Safety Department says in a statement that the black plastic bags were discovered outside a tunnel that connects central Acapulco to the outskirts of the city. It says the victims were male.
A note left at the scene said the beheadings were revenge for the killing of a man who was shot dead during an attempted kidnapping.
The police statement says the heads were discovered Sunday, the same day armed men attacked a police station in the city, wounding an officer. The same suspects later shot at a house, wounding two people at the residence.