RIVERTON, Wyo. (AP) _ Fire investigators in Riverton, Wyoming say they've yet to determine the cause of a trailer fire that killed three small children and critically injured a Torrington woman last summer,

Fremont County and Wyoming State Fire Marshal's Office investigators say fire victims have given differing accounts of where in the trailer the fire started and how the fire behaved.

The Aug. 7 fire killed three siblings _ 2 year old Kathryn Mullins, 1-year-old Ezra Black, a 3-year-old boy, Jesse Black. 29 year old Bridget Mullins is recovering in Torrington.

The young victims were three of nine people inside the mobile home just outside the Riverton city limits when the fire broke out in the early morning. The fire destroyed the structure in a matter of minutes.