The blaze broke out at 2 a.m. Sunday in the 600 block of Penn Avenue.
Firefighters struck a second, then third alarm as the blaze spread to several buildings.
It took them about two hours to get the upper hand.
Officials say most of the damage was in the rear of the buildings.
There were no immediate reports of injuries.
Fire investigators are working to determine what sparked the blaze.
------
Send a News Tip to Action News
Learn More About 6abc Apps