A state prosecutor says the body of one of Mexico's most feared drug lords was stolen from a funeral home by a group of armed men. It occurred a day after Zetas head Heriberto Lazcano was fatally shot in a gunfight with marines.

Coahuila Attorney General Homero Ramos says two men were killed by marines Sunday outside a baseball game in the town of Progreso. He says the fingerprints of one man matched the records of Lazcano, an army special forces deserter whose brutal paramilitary tactics helped define the devastating six-year war among Mexico's drug gangs and authorities.

Early Monday morning, Ramos said, a group of armed men raided the funeral home where the bodies were kept, and stole both corpses.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

Fingerprints confirm that cartel leader Heriberto Lazcano, an army special forces deserter whose brutal paramilitary tactics helped define the devastating six-year war among Mexico's drug gangs and authorities, was killed in a firefight with marines in a state on the border with the Texas, the Mexican navy said.

The navy said that fingerprints taken from the body of a man shot Sunday in the northern state of Coahuila were entered into a forensic database and matched existing records of Lazcano's. It also says photos of the body appear to match Lazcano.

The statement refers to reports in several Mexican newspapers that cite unnamed sources as saying that the body has since disappeared. The statement says only that it gave the body to local authorities, and offers no details.

The U.S Drug Enforcement Agency said it was still awaiting confirmation that one of Mexico's most feared drug lords had been slain.

Lazcano's death is one of the most significant victories in Mexico's militarized battle with organized crime two months before the man who sharply expanded it, President Felipe Calderon, leaves office. Lazcano was credited with bringing military tactics and training to the enforcement arm of the Gulf Cartel, then splitting from his former bosses and turning the Zetas into one of the country's two most potent cartels, with a penchant for headline-grabbing atrocities and control of territory stretching along the U.S. border and at least as far south as Guatemala.

Most recently, the Zetas were linked to the assassination of the nephew of the governor of Coahuila last week, a slaying that prompted the federal government to dispatch additional troops, federal police and criminal investigators to the state.

The death also appears to help Mexico's most-wanted man and the Zetas' bitterest enemy, Sinaloa cartel head Joaquin "El Chapo" Guzman, who has been waging a vicious battle with the Zetas for territory along the U.S. border and other parts of Mexico.

Mexican authorities have announced a string of arrests of high-profile Zetas figures in recent months. Such captures often lead authorities to higher-ranking figures.

The Zetas, which Lazcano helped found with other deserters from an elite army unit, have carried out some of Mexico's bloodiest massacres, biggest jail breaks and fiercest attacks on authorities.

Lazcano, who is also known as "El Verdugo" (the Executioner), is suspected in hundreds of killings, including the June 2004 slaying of Francisco Ortiz Franco, a top editor of a crusading weekly newspaper in Tijuana that often reported on drug trafficking. Ortiz Franco was gunned down in front of his two young children as he left a clinic.

The United States has offered a $5 million reward and Mexico an additional $2.3 million for information leading to Lazcano's arrest.

The Sunday shootout came in the rural area of Progreso, Coahuila, about 80 miles (125 kilometers) west of the Texas border, near Laredo.

The navy said it received complaints about armed men in the area and sent a patrol to check out the reports. Gunmen tossed grenades at the patrol from a moving vehicle, wounding one of the marines. His injuries were not life-threatening.

Two of the gunmen were killed in the ensuing shootout, the navy's statement said. In the gunmen's' vehicle, authorities found a grenade launcher, 12 grenades, what appeared to be rocket propelled grenade launcher and two rifles.

Under Lazcano's leadership, the Zetas recruited more hit men, many of them former Mexican soldiers, and hired "kaibiles," Guatemalan soldiers trained in counterinsurgency, transforming what had been a small group of assassins into a ruthless gang of enforcers for the Gulf cartel. The Zetas also were in charge of protecting the Gulf cartel's drug shipments.

The Zetas finally split from their former bosses in 2010 and have since been fighting a vicious battle for control of the drug business in northeastern Mexico, the traditional home base of the Gulf cartel. The result has been a surge of drug-related killings.

Lazcano "is credited with strengthening the organization ... he created a new structure of regional cells that specialize in specific crimes," Mexican federal prosecutors say in their profile of Lazcano.

The Zetas also earned notoriety for brutality by becoming the first to publicly display their beheaded rivals, most infamously two police officers in April 2006 in the resort city of Acapulco. The severed heads were found on spikes outside a government building with a message signed "Z" that said: "So that you learn to respect."

Even with the death of Lazcano, the Zetas apparently would still be run by a ruthless capo, Miguel Angel Trevino Morales, who has a reputation for being even more brutal than Lazcano. Officials say Trevino Morales, also known was "Z 40," has taken on a greater leadership role and has even been reported to have replaced Lazcano as operational chief.

The report of Lazcano's death came just hours after the navy nabbed a suspected Zetas regional leader accused of involvement in some of the country's most notorious crimes in recent years.

Navy spokesman Jose Luis Vergara said Salvador Alfonso Martinez Escobedo was arrested Saturday in Nuevo Laredo, across from Laredo, Texas. The official said Martinez is believed to have masterminded the massacre of 72 migrants in the northern state of Tamaulipas in 2010.

The man known as "Squirrel" also has been linked to the escape of 151 prisoners in 2010 from a jail in the city of Nuevo Laredo, the recent flight of 131 prisoners in the city of Piedras Negras and the killing of U.S. citizen David Hartley in 2010 on Falcon Lake, which straddles the U.S.-Mexico border.

The death of Hartley drew wide attention as it appeared Hartley and his wife, Tiffany, were on a personal trip when he was shot by Mexican criminals on Sept. 30, 2010. The Hartleys were using personal watercraft on Falcon Lake when David Hartley was shot in the head and fell into the water.

The navy is also blaming Martinez for the killing of the Tamaulipas state police commander and chief investigator on the case, an attack that hampered the investigation.

The navy said Martinez is also a suspect in dozens of killings of people who were buried in mass graves at the same site of the 2010 massacre of migrants. Nearly 200 bodies were discovered in April 2011 in the town of San Fernando, close to the U.S. border. Those two crimes have been the most fatalities since Mexico's federal government launched an armed offensive against drug traffickers in December 2006.

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Associated Press writers Olga R. Rodriguez and Mark Stevenson contributed to this report