Seven mutilated and dismembered bodies were found in Culiacan, the capital of the northwestern Mexican state of Sinaloa, state prosecutors said.
The bodies were discovered Tuesday after police received a tip that several trash bags had been dumped in a street, the Sinaloa Attorney General's Office said.
The body parts of seven males were stuffed into 13 trash bags and dumped in the thoroughfare, the AG's office said.
Investigators initially thought the victims were police officers because they wore black clothing similar to that of the special operations unit, but it turned out that the uniforms did not belong to any police agency, prosecutors said.
The human remains were taken to the coroner's office for identification.
A message alleging corruption within the Sinaloa state police was left with the bodies, the AG's office said.
Sinaloa is home to the drug cartel led by Joaquin "El Chapo" (Shorty) Guzman, who was arrested in Guatemala in 1993 and pulled off a Hollywood-style jailbreak when he escaped from the Puente Grande maximum-security prison in the western state of Jalisco on Jan. 19, 2001.
The Sinaloa organization, sometimes referred to by officials as the Pacific cartel, is the oldest drug cartel in Mexico and Guzman, considered extremely violent, is one of the most-wanted criminals in Mexico and the United States, where the Drug Enforcement Administration has offered a reward of $5 million for him.
Sinaloa, the birthplace of many of Mexico's drug lords, is currently the scene of a bloody turf war among several cartels, with most of the fighting involving the Sinaloa organization and the Tijuana cartel. EFE