Americans slain in Mexico OAXACA, Mexico (UPI)—Investigators today reviewed their files of narcotics traffickers in search of clues to the ambush slayings of six persons, persons, including three Californians, Californians, who were robbed of $60,000. Investigators said the killings occurred on a lonely road near this southwestern Mexican city last week. The victims were identified by police as Teresa Ward Kellie, Douglas Michael Dighero and Paul Raymond Smith, all of Fort Bragg, Calif. Their bodies were found by peasants, along with those of two Mexicans, Luis Alberto Villagomez Hernandez, Manuel Hinojosa Hernandez and one unidentified person. The six bodies were discovered in the burned-out shells of two Volkswagen vans last Saturday morning on a dirt track near the village of San Juan Tilquiapal, 37 miles south of Oaxaca, a Judicial Police spokesman said. The money stolen was apparently apparently destined for the purchase purchase of marijuana and hashish in a remote jungle rendezvous, investigators said. The six victims "were apparently apparently led to the place Friday night by someone who told them they would be able to buy marijuana marijuana and hashish. Instead the killers were waiting for them," police agent Manuel Fernandez of the Federal Judicial Police in Oaxaca told UPI. "The motive was robbery of $60,000 they were going to use to buy the drugs," he said.