Topeka ? The Topeka Fire Department says two fires that broke out at vacant houses were intentionally set.

The department says the fires were set about a block away from each other on Monday night. Firefighters say flames at the first home had multiple points of origin. Two homeless people were inside the house during the fire and one suffered minor burns trying to put it out. The man refused medical treatment.

Firefighters saw smoke after extinguishing the flames and discovered the second fire, which was also extinguished.

They say the fires caused a combined $10,500 in damages.

Authorities are investigating.