Many of the bodies have been found bound or gagged. Some showed signs of having been tortured, according to a federal prosecutors official who spoke today on condition of anonymity because he is not authorized to talk to the press.
The graves are in La Barca, in a remote area by Lake Chapala, which is popular among tourists and American retirees.
Local police officers who confessed to working with a drug cartel led agents to the mass graves last week near the border between Jalisco and Michoacan states.