FORT YATES (AP) - Authorities believe someone set a fire on the old Sitting Bull College campus.

No one was hurt in the fire, which was reported about 4:30 a.m. last Sunday. But officials said it caused thousands of dollars in smoke damage and forced the college staff to move during the cleanup.

The fire started on the outside of a doorway on the side of the main campus building, leading to a storage room, officials said. Two fire doors helped contain the blaze, they said.

Authorities said they found gasoline trails.

"It's too bad something like this has to occur because our college serves the entire community and up to this point, we've only had a few isolated incidents of crimes against the college," college President Laurel Vermillion said.