( CNN ) -- A fire broke out inside the reactor building at a nuclear power plant on France 's northern coast , but there were no injuries or release of radiation , French utility EDF reported Thursday . The cause of the blaze in Unit 2 of the Penly nuclear power plant , near the English Channel port of Dieppe , was still under investigation , EDF said . The fire was extinguished Thursday afternoon , and inspectors were inside the unit , the company said . The reactor shut down automatically when the fire broke out , and regional authorities were notified immediately , EDF said . Nuclear power provides more than three-quarters of France 's electricity . The two pressurized-water reactors at Penly , designed by the French nuclear company Areva , went online in the early 1990s .
The cause of the fire at the Penly nuclear plant is under investigation . There was no release or radiation , and there were no injuries , the owner says . The plant is on the English Channel coast in northern France .