A large concrete building owned by State Inc., 6838 S. Fourth West, sustained $75,000 in damage during an early morning fire Sunday.

The building was fully engulfed when the Midvale Fire Department responded at 5:45 a.m. with two engines, and the blaze was not controlled until 6:24 a.m., according to fire officials.Four firefighters suffered minor injuries and were taken to a hospital where they were treated and released.

Initial reports said explosions were heard within the building. The cause has not been determined, and the fire is under investigation by the Salt Lake County arson task force.