DANVILLE, Va. (WFXR) — First responders were called out to a fire at a Danville apartment building overnight, which heavily damaged one of the units.

According to the Danville Fire Department, units responded to a report of a structure fire at 360 Seminole Trail just before midnight.

When crews arrived at the scene, officials say they found a two-story, 12-unit apartment building with heavy flames coming from one apartment in the center. First responders immediately started evacuating the adjoining apartments and extinguishing the fire.

Even though the blaze caused heavy fire damage to both floors of the original apartment, crews say they were able to contain the fire to the one apartment.

The department says all of the building’s occupants — except for those in the apartment where the fire started and the neighboring apartment, which will need to be cleaned up — were able to return to their homes.

Fire personnel reportedly stayed at the scene for 2.5 hours, receiving assistance from the Danville Life Saving Crew and the Danville Police Department.

As of this writing, the Danville Fire Marshalls’ Office is still investigating the cause of the blaze, officials say.