DICKINSON, N.D. (November 7, 2009)--Preliminary autopsy results show drowning as the cause of death for three North Dakota college softball players found dead inside a sport utility vehicle submerged in a rural farm pond, authorities said.

Stark County Sheriff Clarence Tuhy said Friday that two of the women's bodies were found in the SUV's rear cargo area and one was found in the middle of the vehicle.

The bodies of Kyrstin Gemar 22, of San Diego, Calif.; Afton Williamson, 20, of Lake Elsinore, Calif.; and Ashley Neufeld, 21, of Brandon, Manitoba, were found Tuesday.

Investigators believe the Dickinson State students were on a stargazing trip Sunday and likely drove into the water in the darkness.

A complete autopsy report, including tests for drugs and alcohol, isn't expected for a week or two.