A 46-year-old man here apparently hanged himself Wednesday after killing his 11-month-old son in their house.

Police said that Masami Suzuki's 34-year-old wife, Harumi, found him hanged in the kitchen at around 6:40 a.m. The couple's son, Ryuta, was found dead on a futon.

Suzuki left a suicide note, prompting speculation that he killed Ryuta before taking his own life, police said. The couEple's 7-year-old twin sons were not hurt.