CULIACAN, Mexico – The bodies of three men, two of whom were frozen, were strung up on a bridge in Guamuchil, a town in the northwestern Mexican state of Sinaloa, prosecutors said.

The unidentified bodies were found Saturday morning hanging off Puente Negro, which is within the city limits of Salvador Alvarado, Sinaloa state Attorney General’s Office spokesmen said.

One of the men was naked, had been tortured and had a gaping wound in the abdomen from what appeared to be an amateur autopsy, the AG’s office spokesmen said.

The other two victims had also been tortured and were apparently kept in a freezer until being disposed of, the officials said.

Two men and a woman, meanwhile, were murdered in Culiacan, the capital of Sinaloa.

Gunmen followed the three victims and opened fire on them with 9 mm pistols, the AG’s office spokesmen said.

The gunmen killed Jaime Villa Miranda, 19, and Eden Cabrera Castro, 43. The third victim was not identified.

About 20 people have been killed this weekend in Sinaloa, with eight of the victims gunned down while playing volleyball at a park.

The murders may be linked to the recent killing of Francisco Arce Rubio, who was the leader of the Los Antrax gang, Sinaloa Attorney General Marco Antonio Higuera Gomez told reporters Saturday.

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 between Guzman and the Beltran Leyva cartel, which arose as a splinter group of the Sinaloa organization.