INDIANAPOLIS (WISH) — Two overnight fires burned six houses and left two firefighters with slight injuries, the Indianapolis Fire Department says.

2 houses destroyed, 1 damaged on College Ave.

Two vacant houses were destroyed and an occupied house was damaged in a fire that began around 3:45 a.m. on North College Avenue near 20th Street.

IFD says one firefighter received a slight injury while battling the blaze. He was taken to a hospital for evaluation but is expected to be okay.’

Both vacant houses were a total loss. The occupied home sustained only “slight exterior damage,” according to IFD Battalion Chief Rita Reith. The occupied home sustained only slight exterior damage.

It’s not clear how the fire started or if foul play was involved.

3 vacant homes a ‘total loss’ after Hamilton Ave. fire

Indianapolis firefighters were called just before 1 a.m. to a fire at the intersection of Hamilton and English Avenues. That’s at the edge of the Woodruff Heights neighborhood on the city’s near east side.

Three two-story homes were destroyed by the flames, which crews marked under control just before 3 a.m., IFD says.

One firefighter received a slight injury, was checked out at the scene, and returned to work, according to IFD Battalion Chief Rita Reith.

The cause of the fire is under investigation.