Xinhua reported citing the Guanajuato Attorney General's Office that the bloodshed occurred during a Christmas posada, a traditional Mexican celebration, in the community of San Jose del Carmen, and the investigation is underway.
According to initial reports from the municipal government, a group of armed attackers arrived unexpectedly and opened fire at posada participants, the majority of them young people, leaving 12 dead and 10 injured.
The wounded were taken to hospitals in the municipality, authorities said, without providing details about their conditions.
AMK/PR