Investigators are looking into the cause of a house fire in Quincy Saturday night.

Firefighters responded to a structure fire at 630 North 5th about 5:15 p.m. Saturday.

Fire crews arrived to find flames and heavy smoke coming from the attic and roof of the two-story house.

The fire was contained quickly. No one was in the home. No one was hurt. Crews remained at the scene about two-and-a-half hours.

The residence was vacant and there were no utilities connected to it.

Quincy Police and fire investigators are trying to determine a cause of the fire.