A 17-year-old high school boy arrested Saturday in the baseball bat bludgeoning of pedestrians in Tokyo's Shibuya Ward has told investigators that he carried out the attack because he had been beaten by his father and had wanted to embarrass him by attacking others, police said Monday.

It was also learned that a police officer visited the boy's home the previous evening after the boy and his father had fought.

One person was seriously hurt and seven others sustained minor injuries during the violent Saturday spree, which started in a Shibuya Station lavatory at around 9:10 p.m. and continued on nearby streets, police said.