The bodies of nine men, most of them dismembered, were found inside a sport utility vehicle with Texas license plates in northeastern Mexico, prosecutors said Monday.
Authorities made the discovery after receiving a report late Sunday of an abandoned vehicle near Ciudad Victoria, the capital of the state of Tamaulipas, which borders Texas, the state prosecutor's office said in a brief statement.
Northern Mexican states are the scene of turf wars between powerful drug cartels vying for control of lucrative trafficking routes to the United States, with decapitations among the brutal fear tactics.
More than 70,000 people have died in drug-related violence since 2006, with the cartels fighting each other, as well as troops deployed by the government to combat the gangs.
Elsewhere in Mexico, officials said five people, including a 45-year-old US man, were killed in two bar shootings in the western city of Guadalajara late Sunday. Prosecutors suspect organized crime was behind those two attacks.