The rooftops of many homes in Tsuruoka, Yamagata Prefecture, were damaged by the magnitude-6.7 earthquake that struck late on June 18. (Video footage by Yuhei Iino)

At least 26 people were injured, homes and buildings were damaged and power was cut off to thousands when the magnitude-6.7 earthquake struck off the coast of Yamagata Prefecture late on June 18.

No fatalities have been reported, and electricity was restored early on June 19.

The injuries, as of 9:45 a.m. on June 19, were reported in the northern prefectures of Miyagi, Yamagata, Niigata and Ishikawa, the Fire and Disaster Management Agency said.

Among the injured was a man in his 30s in Tsubame, Niigata Prefecture, who fractured a leg in a fall down stairs after the quake struck at 10:22 p.m., according to prefectural government officials.

A woman in her 60s suffered a minor injury after falling out of her wheelchair, they said.

The quake registered an upper 6 on the Japanese intensity scale of 7 in Murakami, Niigata Prefecture. A tsunami warning was issued, but it was lifted around midnight.

Prefectural officials were cautioning residents in northern Niigata Prefecture where rain was falling in the morning to be cautious of possible landslides because the shaking from the quake may have weakened the foundation.

Structural damage to homes and public facilities were reported over a wide area.

Roof tiles fell off many homes in Tsuruoka, Yamagata Prefecture. Soil liquefaction occurred at a large parking area, and one car’s tires had submerged in the ground.

The main floor of a gymnasium in Murakami that was transformed into an evacuation center could not be used because of falling ceiling panels.

At one time, about 200 people evacuated to the gymnasium, and they had to find space between exercise machines or in the lobby to lie down.

By 6:25 a.m., all evacuees had returned home.

Rocks as large as 50 centimeters in diameter were found near the entrance to the Kobo Tunnel in Murakami. The rocks appeared to have fallen from a cliff about 50 meters high.

The area is known as having a solid foundation so the damage illustrated the strength of the quake, according to a Niigata prefectural government official who went to the scene.

According to Tohoku Electric Power Co., 9,232 homes in Yamagata and Niigata prefectures were temporarily without electricity soon after the earthquake, but all services had been restored as of 6:44 a.m.

The Shinkansen bullet train service in northern Japan was temporarily suspended in the immediate aftermath of the earthquake.

East Japan Railway Co. officials said the Tohoku, Yamagata, Akita, Joetsu and Hokuriku lines had all returned to normal from the start of operations on June 19.