A work group has been dispatched to the scene of an explosion at a power plant where 21 people were killed in Dangyang, central China's Hubei Province.

The State Administration of Work Safety (SAWS) confirmed that at least 21 people were killed and five injured by high-pressure steam when a pipeline exploded.

The accident happened around 3:20 p.m. Thursday at the Madian Gangue Power Generation Co. Ltd. in Dangyang City.

The cause of the blast is still unknown.