A man on a scooter stabbed five men at random in Tokyo’s Shibuya district late Thursday, inflicting light injuries.

One of the victims was Genki Sudo, 25, a fighter active in the mixed martial arts sport K-1.

The Metropolitan Police Department on Friday released an image of the assailant captured by a security camera at a convenience store where one of the attacks took place.

The attacker, who was wearing a helmet and dark sunglasses, assaulted his victims over a 10-minute period in a crowded area near JR Shibuya Station at around 10:40 p.m. The five men were stabbed at different locations.

The assailant was described as about 20 years old and approximately 180 cm tall. They said he was wearing a blue shirt and black pants, a black helmet, dark sunglasses, and his arm is tattooed.

The assailant apparently used a utility knife to stab his victims, and at times seemed to be mumbling incomprehensibly, police said.

He first chased after a 20-year-old man and a woman on a motorcycle for more than 500 meters, then stabbed the man in the stomach, saying, “Stop necking.”

The attacker then rode after another man on a motorcycle, stabbing the 20-year-old victim in the legs, about 100 meters west of where he stabbed the first victim, police said.

His third victim was an 18-year-old youth, whom the attacker slashed in the chest after getting off his scooter in front of the convenience store, police said.

The victim had been jogging, and the assailant chased him into the convenience store before attacking him. This attack was captured by the store’s security camera.

The assailant then got back on his scooter and minutes later K-1 athlete Sudo and a 41-year-old man, riding together on a motorcycle, became his fourth and fifth victims, police said. He stabbed the two in the back and chest before fleeing on his scooter in the direction of Daikanyama Station on the Tokyu Toyoko Line.

Police said earlier that one of the five victims was seriously wounded, but in a later update said all five turned out to have only sustained light injuries.

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