Baltimore fire officials are busy trying to figure out what caused three fires in the city Tuesday.
Crews were called to two separate fires only minutes apart.
A row home in the 200 block of Mount Holly Street caught fire shortly after 11 a.m.
The corner home was occupied, and one firefighter suffered a minor burn injury and was taken to the hospital.
Then on the other side of town, a vacant house fire in east Baltimore on North Milton Avenue caught fire. Crews were able to control the fire in about 50 minutes.
No one was hurt.
Earlier Tuesday morning, a vacant house fire in downtown Baltimore also caught fire.
That fire happened on Greenmount Avenue between Biddle and Chase streets.
Crews arrived to find heavy smoke and flames coming from the second and third floors.
No one was hurt in that fire, either.