The Tucson Fire Department responded to a fire at inside Cross Roads Restaurant on Sunday morning at 1:17 a.m.
The restaurant is located at the corner of 4th Avenue and 36th Street.
Engine 10 was first on the scene at 1:21 a.m. followed shortly by Engine 141 from South Tucson Fire.
Crews immediately pulled lines for a fire attack after noticing a significant amount of smoke and flames.
This fire eventually went to three alarms.
The fire was under control at 3:06 a.m.
A South Tucson firefighter was taken to the hospital for heat exposure in stable condition.
Crews are still investigating the cause of the fire.