FAIRVIEW, Utah (AP) — The Latest on a central Utah wildfire (all times local):

11:30 a.m.

Nearly 100 firefighters and over a dozen fire engines are battling a wildfire that has burned two structures and threatened an additional 150 in Sanpete County central Utah.

Cause of the fire that started Monday near Milburn and Indianola in Sanpete County remained under investigation Tuesday.

The fire burned overnight in timber, brush and grass, growing to an estimated 1.5 square miles (4 sq. kilometers).

Several areas are under mandatory evacuations.

___

9:15 a.m.

Authorities in central Utah say a wildfire in Sanpete County has burned an estimated 1.5 square miles (4 sq. kilometers), destroyed at least two structures and forced the evacuation of approximately 350 people while threatening 150 homes.

It isn't yet known what caused the fire near Milburn, Fairview and Indianola to start Monday and there's no report on a containment percentage.

The fire is threatening watersheds, utilities and other infrastructure in the area.

The Sheriff's Office says the Red Cross is helping officials set up evacuation centers.