Tokyo (CNN) Japanese authorities have named 51-year-old Ryuichi Iwasaki as the attacker who stabbed two people to death in a rare act of public violence in Japan on Tuesday.

Iwasaki held a knife in each hand as he slashed children waiting for the school bus in the city of Kawasaki, about 13 miles (21 kilometers) from Tokyo, police said.

An 11-year-old girl and 39-year-old father were killed , while 17 others were injured. Sixteen of the wounded were children, authorities said.

The attack took less than a minute. Iwasaki died of a self-inflicted wound shortly after, according to police.

Police raided Iwasaki's home in Kawasaki early Wednesday and are investigating what motivated him to attack children.

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