Photo/Illutration Four bodies were found in this vehicle on the summit of Mount Mizuishiyama in Iwaki, Fukushima Prefecture, on Jan. 22. (Toru Furusho)

IWAKI, Fukushima Prefecture--The bodies of a mother and her three teenage children were found with an injured man in a car on a mountaintop here in a suspected murder-suicide, police said.

Fukushima prefectural police said they received a call around 1:30 a.m. on Jan. 22 from the man, saying, “I stabbed people.”

Based on the call, officers went a parking area at Mizuishiyama Park on the summit of the 735-meter-high Mount Mizuishiyama.

The body of the woman, 43, was discovered in the front passenger seat of the car, while her twin daughters, 13, and her son, 15, were found dead in the back seat. They were all bleeding from stab wounds to their necks, police said.

The man in his 50s who called the police was bleeding from the neck and stomach in the driver’s seat, police said.

He has slipped in and out of consciousness and was taken to a hospital, they said. He told police that he was dating the woman.

Several knives were found in the car, but there was no evidence of a struggle, leading police to treat the case as a murder-suicide.

The Iwaki Central Police Station plans to question the man and is investigating the relationship among the five people.

The site is about 10 kilometers northwest from JR Iwaki Station.