INDIANAPOLIS (WISH) — One battalion from the Indianapolis Fire Department responded to three building fires in a five-hour span early Wednesday.

The fires — all of which occurred near Michigan and Rural streets on Indy’s east side — were ruled arson, according to IFD Battalion Chief Rita Reith.

The first fire was reported just before 1 a.m. in the 300 block of LaSalle Street. About three hours later, firefighters responded to a fire at a vacant house in the 400 block of North Gray Street.

Around 5:30 a.m., a fire was called in from the intersection of East Michigan Street and Temple Avenue, just west of Rural Street. Firefighters arrived and saw heavy fire on the second floor and roof of a two-story brick building. It took less than an hour for crews to put the fire out.

“Strong work by the crews involved in mitigating the fires this morning as it was the same firefighters on all three,” Reith said in a release. 

Firefighters believe all three buildings were vacant. Reith says investigators still have a lot of questions about what happened.

“The fire remains under investigation and it has not been confirmed whether or not the fires were set by the same person(s) nor connected.”

No injuries were reported.

Anyone with information about the fires should call the Indiana Arson Hotline at 1-800-382-4628 or Crime Stoppers at 317-262-8477.