A Saturday afternoon fire in the ductwork above the main manufacturing area at the Bobcat Co. was doused partially by a sprinkler system and then finished off by Bismarck firefighters.

The fire was in an "extensive length" of the duct work, said Bismarck Fire Chief Joel Boespflug.

Damage was limited at the facility, located at 521 S. 22nd St., according to Boespflug. Evacuated workers returned to the facility shortly after firefighters finished their work.

The cause of the fire hasn't been determined.