KAWASAKI, Japan — A man stabbed at least 20 people, including 18 schoolchildren waiting at a bus stop, before fatally stabbing himself Tuesday morning, according to the school the children attended. One of the schoolchildren and a 39-year-old man died in the attack, in a suburb southwest of Tokyo.

NHK, Japan’s public broadcaster, reported that all the children were girls. Citing the Kanagawa prefectural police, NHK named the girl who died as Hanako Kuribayashi, 11. The man who was killed was identified by the broadcaster as Satoshi Oyama, 39, a father and an official in the Foreign Ministry.

The attacker, identified by NHK as Ryuichi Iwasaki, 51, stabbed himself in the neck and subsequently died, officials said. The attack took place in Noborito-Shinmachi town in Kawasaki City.