The bodies of nine decapitated men were found in a vacant lot in Tijuana Sunday, part of a wave of violence that claimed at least 23 lives over the weekend in this border city plagued by warring traffickers, authorities said.
The heads were discovered in plastic bags near the bodies in a poor neighborhood of Tijuana, across from San Diego, Baja California state police said in a statement. Three police identification cards were also found at the site.
More than 4,000 people have died so far this year in drug-related violence in Mexico.
Across Tijuana on Sunday, attacks by gunmen killed five people in addition to the nine beheaded bodies.
State police said nine more people were killed in attacks on Saturday. In one, gunmen killed a 4-year-old child in an attack on a grocery store.
Drug cartel war
President Felipe Calderon on Sunday vowed his government would never negotiate with drug lords no matter how much the violence escalates.
Since taking office on Dec. 1, 2006, Calderon has sent more than 20,000 soldiers to battle drug trafficking across Mexico, helping to seize of 70 tons of cocaine and 3,700 tons of marijuana, he said.