OSAKA (Kyodo) A 17-year-old high school student was arrested Saturday on suspicion of killing and abandoning the body of a 15-year-old from a different school who was found dead early Friday in a river in Tondabayashi, Osaka Prefecture.

The suspect, whose identity is being withheld because he is a minor, has admitted to the allegations, police said. The youth said he killed the other boy after growing close to the victim's girlfriend, who was coming to him for advice on their apparently sour relationship, because he thought that was only way he could help her.

The senior, who lives in Tondabayashi, told the police that he couldn't forgive the boy for troubling the girl, they said.