Authorities in the northern Mexican city of Torreon said Saturday that they found 10 "mutilated" bodies inside the back of a truck, the state-run news agency reported.
The seven men and three women appear to have been killed several days ago in various locations outside the city and then later brought in, Notimex reported.
The news agency said authorities also had reports of human heads, found throughout Torreon, but it was not immediately clear whether those heads belonged to the bodies in the truck.
Separately, gunmen entered a downtown bar in the northern Mexican city of Monterrey and shot 20 people dead, police told the state-run news agency Saturday.
A preliminary investigation suggests that attack was sparked by a dispute between organized crime groups for control of the El Sabino Gordo nightclub, where drugs are allegedly sold, said Jorge Domene Zambrano, a public safety spokesman.
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