Mexican authorities are investigating the possible emergence of a new drug gang that appears to be taking responsibility for six killings in the state of Guerrero.
Police say they found the bodies inside a car along with a message reading: "This will happen to all rapists, extortionists and kidnappers." It was signed "the New Cartel of the Sierra." It's authenticity is being investigated.
There are at least seven major drug-trafficking cartels in Mexico.