Two teenagers died and four other were injured early Sunday when their car hit a wall alongside a road in Sakai, Osaka Prefecture, police said.

The Osaka Prefectural Police identified the two fatalities in the 1:40 a.m. accident as Ayumu Kumaki, 18, unemployed, and Isao Karaki, a 16-year-old vocational school student.

The four slightly injured were the car's 19-year-old driver, Takuya Inoue, another 19-year-old male, and two 15-year-old girls, the police said.

They said they suspect Inoue lost control of the vehicle while speeding along the seaside road.

In another incident, a 15-year-old girl died after being struck by a drunk driver in Koura, Shiga Prefecture, early Sunday.

Police arrested the driver of the car, Katsuhiko Miyagawa, 23, for driving under the influence of alcohol and were questioning him further to see if he will be charged with fatal professional negligence.

According to police, Ayaka Kawasoe, a third-year student in junior high school, was riding on the back of her friend's bicycle at an intersection when Miyagawa's minivehicle hit them. Kawasoe died due to head injuries. Her friend sustained a fractured pelvis.

It was not clear which of the two parties ignored traffic signals in the 5:15 a.m. accident, according to police.