Crews are investigating a suspicious house fire in Kalamazoo early Saturday. Flames broke out at the home on Neumaier Court and Jackson Street around 4 a.m. Saturday. Firefighters tell us there was no one home when the fire broke out. The house was actually condemned after a fire broke out there two weeks ago. It took crews about three hours to put out the flames. The home next door has suffered some water damage from firefighters trying to put out the nearby flames. One firefighter suffered from heat exhaustion but is expected to be okay.