A railway power outage in Tokyo disrupted the morning commute for thousands on Friday as two main lines with some of the world's busiest stations were halted after reports of a fire.

Axar.az reports, citing Reuters, trains on East Japan Railway's 9020.T Yamanote and Keihin-Tohoku lines were halted in all directions with no timetable for resumption, the railway said.

A fire was reported on the tracks near Tamachi Station, where both lines stop, shortly before 8 a.m. (2300 GMT on Thursday). Flames were coming from a transformer in the track area, and the fire was nearly extinguished about 30 minutes later.

The Yamanote Line passes through stations including Shinjuku, which handles about 3.5 million passengers daily. The Keihin-Tohoku Line serves major hubs such as Tokyo and Yokohama.