Ithaca Police said they believe an improperly discarded cigarette caused a structure fire Saturday night.
Ithaca Police were called to 416 W. Seneca St. just before 8 p.m. Saturday for reports of a house fire.
Officers found fire coming from the rear of the building.
Officers assisted the Ithaca Fire Department in ensuring all residents were evacuated.
The cause of the fire is under investigation.
There were no known injuries as a result of the fire.