Police in the Mexican resort of Acapulco found the decapitated bodies of two men in front of a bar where 11 men were reportedly abducted earlier this month, officials said.
Shell casings from assault rifles and two hand-written messages whose contents were not disclosed were found at the scene, according to a statement from police in the Pacific coast state of Guerrero where Acapulco is located.
Such messages are often left by drug gangs.
Eleven men were reported abducted from the bar on December 17. Such establishments are frequently the targets of extortion attempts. Two of the abducted men were later found dead. Their hands and feet had been cut off.
Elsewhere in Guerrero, police found the remains of three people in a clandestine grave in the town Teloloapan, according to state police. The police report said the three unknown people were believed to have been killed about four months ago.
In Ayutla, Guerrero, meanwhile, a car ran into a group of people leaving a church on Sunday, killing three and injuring four.
And in the Gulf coast state of Veracruz on Monday, one policeman was killed, and a local police commander was wounded when a man opened fire on municipal offices in the town of Otatitlan. Three people who were attending a wedding at the town hall were wounded in the shootout.
Assistant state prosecutor Reynaldo Escobar said the victims at the wedding included a boy, one woman and an adult male.
And in the northern state of Durango, the army reported it had seized a cache of 84 rifles and 46 pistols, including one assault rifles with gold-coloured inlays and another that has a grenade-launcher attachment.
The Defence Department said troops patrolling the mountainous area of Tamazula, Durango discovered the weapons and 770 kilograms of marijuana in 191 bales. The army said Tamazula, located near the border with Sinaloa state, “is an area considered a bastion of criminal organisations”.