Fire crews responded to a steel plant in Koppel overnight after a series of explosions inside an industrial building. According to Beaver County Emergency officials, the fires were reported just before 3 this morning at the TMK IPSCO plant in Koppel. Firefighters were able to bring the fires under control in about an hour. Emergency officials say there was no hazard to the public and no injuries have been reported. The extent of damage to the plant is not known at this time.