The Oklahoma City Fire Department responded to a high-rise alarm fire at the old Oklahoma City jail Monday.

 Crews arrived on scene at Robert S. Kerr Ave. and N. Shartel just before 9 p.m.

Officials say the fire was on the sixth floor of the building, and as a result was treated as a 5-alarm fire which typically calls for about 70 to 80 firefighters. 

Several crews were on the scene. 

The building was secured which created a challenge for the firefighters as they worked to put out the fire. The fire was contained to one room. The building has been vacant since the late nineties and is said to be in poor condition.

Arson investigators were also called to the scene. The cause of the fire remains under investigation.  

This a developing story. Stay with News 9 and News9.com for updates as information becomes available.