Fire crews responded to a fire at a condominium off Frisco Main Street around 4 p.m. Thursday, Aug. 8, according to Summit Fire & EMS.

The fire protection district responded after it received an alert of sprinkler water flow at the Bear’s Den Condos Building B at 117 S. Sixth Ave. in Frisco, Summit Fire & EMS spokesperson Steve Lipsher said. A battalion chief arrived on scene moments later to find that all of the occupants had evacuated the building and one unit on the upper floor was filled with smoke, Lipsher said.

The fire had triggered a single sprinkler head, which “did its job perfectly” and kept the fire from spreading, Lipsher said. No one was in the unit at the time, so “if it weren’t for that sprinkler, the fire certainly could have become a more significant problem,” he said.

Three engines, a fire truck and two medic units responded to the scene and checked for any extension of the fire but found none, Lipsher said. Power, gas and waterflow to the buildling were turned off. It was determined that the fire had been limited to the one condominium unit but that two units below it had been damaged by water, he said.

No one was injured. Fire crews could not provide an immediate estimate on the extent of property damage. The cause of the fire remains under investigation but it is not believed to be suspicious, Lipsher said.

“All things considered, these sprinkler systems when they do work as they’re designed, they really do make a big difference,” Lipsher said. “We’re really thankful there was no injuries.”