Mexico Authorities Discover Six Burned Bodies

01/31/2011 08:38 am ET | Updated May 25, 2011

MONTERREY, Mexico — Mexican authorities say six bodies found outside the northern city of Monterrey were burned so badly that investigators couldn't determine the cause of death or the victims' gender.

A Nuevo Leon state prosecutors' spokeswoman says the bodies were found on a dirt road north of the city Sunday morning and bore the hallmarks of cartel killings.

The spokeswoman said cartels have been known to burn bodies to prevent identification and to terrorize rivals.

She spoke on condition of anonymity because she is not authorized to be identified by name.

Officials say more than 100 people – including at least 20 police officers – have been killed in Nuevo Leon this month as cartels fight over smuggling routes to the United States.