CNN) -- Twelve decapitated bodies were found Thursday on Mexico's Yucatan Peninsula, a local official said.  Forensic personnel analyze bodies found in a suburb of Merida, capital of Yucatan state. 
Eleven of the bodies were found in Chichi Suarez, and the 12th in Buctzotz, a source with the Yucatan state government told CNN.
The heads themselves have not been found, said Yetel Castillo, from the department of communication for Yucatan.
According to The Associated Press, photos of the crime scene showed headless corpses stacked on top of one another in a field outside the city of Merida. Some of the bodies had tattoos and were jumbled amid blankets and tarps.
It appeared to be the largest single group of beheadings in recent years in Mexico, AP said.
The tactic has become more frequent in gangland-style killings, and the largest previous instance of decapitations occurred in 2006, when gunmen tossed five human heads into a bar in central Mexico, the agency added. | 
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