Colorado Springs hazmat crews worked throughout the night to repair nitrogen pipes which caught fire shortly after 10 p.m. last night.
It happened on Cheyenne Mountain Blvd. in Colorado Springs.
Firefighters say the fire was out before they arrived on scene.
No injuries were reported, and the exact cause is still under investigation. Employees of the building have been let back inside.
Crews on scene told 11 News that bushings in the piping likely melted, and the combination of nitrogen and oxygen created small fires which burned themselves out. The extent of damage to the building is still unknown.