Officials in Mexico say police have found 13 bodies dumped near a gas station in the western state of Michoacan.
The bodies were discovered on Monday in the town of Zitacuaro, 160 kilometers west of Mexico City. The victims were all male, and had all been shot in the head.
Michoacan, the home state of Mexican President Felipe Calderon, has been one of the worst-hit areas in a wave of drug-related violence that has left around 50,000 dead over the last several years.
The state has been relatively calm since police killed the top boss of the cult-like La Familia cartel in December 2010. But remnants of the gang are still known to operate in the area.
Some information for this report was provided by AP and Reuters.