Preliminary results from autopsies conduct on three teen girls who died on the Wind River Reservation in Wyoming have been termed "inconclusive.'

It could take four to six weeks to determine how the girls died, officials said. The FBI, the Bureau of Indian Affairs and local authorities continue to investigate.

Alexis Gardner, Alex Whiteplume and Winter Rose Thomas were found dead at a tribal housing complex last week. They were between the ages of 13 and 15.

The complex is located south of Riverton, a border town that the Eastern Shoshone Tribe and the Northern Arapaho Tribe say is still part of the reservation.

Get the Story:
Preliminary autopsy results: 'Inconclusive' (The Casper Star-Tribune 6/9)
Poll: Two-thirds believe Riverton outside of Reservation (KFAK 6/9)

Related Stories:
Three teen girls found dead on Wyoming reservation (6/6)
Three bodies found on Wind River Reservation (6/5)