CHARLESTON, Ill. (WTWO/WAWV) — Residents of a Charleston, Ill. home were displaced early Wednesday morning after a “heavy fire” caused extensive damage to their residence, the Charleston Fire Department said in a news release.

CFD crews were dispatched around 4 a.m. Dec. 22 to a structure fire at 629 W. Elm Ave. Lot 159 in Charleston. Upon arrival, crews said they found heavy fire coming out of a bedroom window and that they were quickly able to put the fire out.

The residents were home at the time of the fire, CFD said in the release, but were able to escape. There was heavy fire damage to the bedroom and smoke and heat damage to the rest of the residence and crews were on scene until around 6 a.m.

One resident was treated on scene for smoke inhalation and CFD said all of the residents have been displaced due to the extensive damage. The fire is currently under investigation, according to CFD.

This is a developing story. Follow for updates.