The cause of an overnight fire is still under investigation.. 
 
After fire crews extinguished the blaze in the 2000 block of 9th street.
 
It happened around 2:30 a.m. on 9th between Harrison and Van Buren streets.
 
Fire officials say there was heavy smoke and fire coming from the back of the house.
 
The police department was called out to the scene to assist fire crews.
 
Firefighters say the home was a vacant property and that the fire started in the back of the house.
 
The cause of the fire is still unknown.