A blast took place early Thursday in a power plant in north China's Hebei Province, leaving three people dead and eight others injured.

Sources with the provincial administration of work safety said the blast happened at around 0:00 a.m. at Xibaipo No. 2 power plant in the county of Pingshan.

The blast occurred when workers were testing the plant's equipment, the sources said, but no further details were available.

A investigation team has been sent to probe into the cause of the blast.