Part of a nuclear power plant in western Japan was on fire Wednesday, but an official said no radiation had leaked.

Smoke poured from a waste disposal facility between the No. 3 and No. 4 reactors at Oi power plant in Fukui at about 6:40 p.m., local government official Hiroaki Fujiuchi said. Two workers were treated for smoke inhalation.

Oi is in Fukui prefecture, about 200 miles west of Tokyo.

Firefighters had difficulty approaching the facility because of the thick smoke, and it took them 90 minutes to confirm there was a fire, said Ikuo Muramatsu, an official with the plant's operator, Kansai Electric Power Co.

The two injured workers were taken to a hospital, and local fire officials said they had not been exposed to radiation.