A female idol was in critical condition after being viciously stabbed during an event for apparently refusing a gift from a reported fan in Koganei, western Tokyo, police said Sunday.

Mayu Tomita, 20, has yet to regain consciousness after being stabbed nearly two dozen times in the neck and chest on Saturday.

Tomohiro Iwazaki, 27, was arrested after witnesses said he attacked Tomita with a knife during an event at around 5 p.m. Saturday. The suspect admitted attacking her, the police said.