Mexican marines have found the bodies of 72 people at a rural location in northern Mexico, after a shootout with suspected drug cartel gunmen that left one marine and three suspects dead. The find appears to be the largest drug-cartel body dumping ground found in Mexico since the president, Felipe Calderon, launched an offensive against drug trafficking in 2006. Mexican drug cartels often use vacant properties or mine shafts to dump the bodies of executed rivals or kidnap victims. The Navy did not give details on the victim's identities, who had killed them, or whether the bodies had been buried. It was also unclear whether the 58 men and 14 women had been killed at the same time, or separately. *Agencies