A 16-year-old boy was arrested Saturday on suspicion of murder after his grandparents were found dead at their home in central Japan, police said.

The high school student in Tahara, Aichi Prefecture, is suspected of fatally stabbing his 75-year-old grandfather around 2 a.m. Friday, the prefectural police said. His 72-year-old grandmother was also found dead and bleeding in the house where the three lived with two other family members, according to the police.

The boy has admitted to killing his grandfather with a knife, the police said. His grandmother’s death is still under investigation.

One of the family members called the police around 4:40 a.m. Friday shortly after the teenager said he had found the couple dead in their bedroom, according to the police.

The names of the boy and the couple are being withheld because he is a minor.

An area near where the bodies of an elderly couple were found in Tahara, Aichi Prefecture, is cordoned off on May 10, 2025. (Kyodo) ==Kyodo

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AloJapan.com