An elderly man and a young girl were killed, with several other people also in "cardiopulmonary arrest", after walls collapsed in a magnitude-6.1 natural disaster that hit Osaka in western Japan on Monday, public broadcaster NHK said.
Live footage showed burst water mains and a house on fire after the quake hit Osaka, which will host next year's Group of 20 summit, just before 8 a.m. (2300 GMT Sunday) as commuters were heading to work.
According to Kansai Electric Power Co., power has been cut to about 170,250 households in Osaka Prefecture and about 690 households in Hyogo Prefecture.
Two elderly men and a 9-year-old girl were died from collapsing walls and furniture. An 84-year-old man in nearby Ibaraki died after a bookshelf fell on top of him at home, according to city officials.
Transport was disrupted and trains stopped amid power outages during the morning commute as the natural disaster struck at 8.a.m. local time (23.00 Sunday, UTC) at a depth of about 13 kilometers (8.1 miles).
Myotokuji temple is destroyed by an quake registering a weak 6 on the Japanese seismic scale in Ibaraki City, the north side of Osaka Prefecture on June 18, 2018. Several others are reported in a state of "cardiopulmonary arrest", a condition usually used by Japanese authorities until a formal examination has been conducted to confirm death.
The quake knocked over walls, scattered goods on the floor of shops and set off scattered fires around Osaka.
Airports in the area were closed for several hours, train lines interrupted and factories had to halt production. It had a depth of about 8 miles (13 kilometers) with an original magnitude measured at 5.9. Television images showed passengers getting off trains onto the tracks between stations.
No tsunami warning was issued.
No irregularities were detected at the Mihama, Takahama and Ohi nuclear plants to the north of Osaka, Kansai Electric Power said.
Senior government officials are gathering for an emergency meeting at the Prime Minister's office, broadcaster NHK reported. Production at the Honda, Mitsubishi and Toyota auto plants was stopped when the quake hit.
In a 1995 deadly quake in the region, which had a magnitude of 7.3 and recorded 7 on the Japanese seismic intensity scale, 6,434 people were killed.