A man who stabbed 10 female passengers on a train in Tokyo was arrested by the Japanese police, public broadcaster NHK reported.

As per reports, the 36-year-old man told the police that he wanted to kill women who appeared happy and chose his targets randomly. A woman in her 20s who was attacked is critical, according to the Japanese media.

The Tokyo Fire Department said nine of the 10 injured passengers were shifted to nearby hospitals, while the tenth was able to walk away. All of the injured were conscious according to the fire department officials.

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The Japanese capital is currently hosting the Olympics, which end Sunday. The site of the stabbing spree was about 15 kilometers (9 miles) away from the main National Stadium.

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The suspect left his knife behind when he ran away, and later walked into a convenience store and identified himself as the suspect on the news, and said he was tired of running away. The store manager called the police after seeing bloodstains on the man’s shirt.

Another local media outlet said he told the police he developed the intent to kill women who “looked happy” and stabbed a woman who happened to be seated near him in the train. He also told the police that he chose to stage the attack inside a train because it offered the chance to kill a large number of people.

The suspect was also carrying cooking oil and a lighter, with which he allegedly intended to set fire inside the carriage, NHK reported.

A witness at a nearby station where the train stopped said passengers were moving out of the carriages asking for help and shouting that there was a stabbing. Another witness told NHK that he saw passengers smeared with blood come out of the train, as an announcer asked for doctors and for passengers carrying towels.

Paramedics and police immediately arrived at the station, one of the witnesses said.