Today in Cancún, police were led to an abandoned Jeep with three dead men announcing a new group, the Mata Zetas, or the Killers of Zetas. The Zetas are the armed forces of the Gulf Cartel that controls drug trafficking on Mexico’s Caribbean coast...

A group of armed men blew up an ambulance Friday, apparently with a grenade, to kill a rival who was being transferred from one hospital to another.

The attackers, travelling in two vans, blocked passage and forced two paramedics and a...