East Japan Railway Co. said it experienced extensive service disruption in the Tokyo area on Sunday afternoon due to a power outage.

While the cause of the outage is not yet known, a fire has been reported at the railway company's substation facility in Warabi, Saitama Prefecture neighboring the capital, the local fire department said.

The fire department in Warabi said it received a call around 12:55 p.m. reporting the sound of an explosion at the substation. JR East said it halted services in the Tokyo metropolitan area including on the Yamanote, Keihin-Tohoku and Joban lines from around the same time.

==Kyodo

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