Head, threatening note, found in Mexico

updated 4:07 p.m. ET July 6, 2008

MEXICO CITY - A human head was left near the home of the Oaxaca state attorney general with a note, purportedly from a drug cartel, threatening three officials of the southern Mexican state, authorities said Sunday.

State prosecutors said the head and note were found Saturday inside a plastic bag left a few yards from Attorney General Evencio Martinez' house in the state capital.

The note threatened Martinez as well as organized crime investigator Pedro Guzman and the leader of the state's governing party, Jorge Franco.

The note signed in the name of the Gulf drug cartel said officials must "learn to respect that we are here and we won't leave."

A body matching the head was found outside the city. Officials said they have not yet identified the man.

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