SHARON, Pa. - Crews from several fire departments were called out early Monday to a structure fire in Sharon.

Dispatchers were told that flames were coming from a home at Hull Street and Ormond Avenue shortly after 5 a.m.

The first firefighter to arrive reported that the building was engulfed in flame and more fire crews were dispatched to keep the blaze from spreading to nearby homes.

By 6 a.m. the fire had spread through the entire two-story wood-frame home that investigators say was vacant.

21 News is working to learn the cause of the fire.