A Chuo University electronics professor died of stab wounds Wednesday after he was attacked by a man in a building on the Korakuen campus in Bunkyo Ward, Tokyo, police and other sources said.

The culprit, dressed in black clothing and a black knit cap, fled the scene, according to the student who found the professor. The man appeared to be in his 30s, the police said.

Hajime Takakubo, 45, of the Faculty of Science and Engineering, was found bleeding from multiple wounds in a bathroom on the fourth floor of the university's No. 1 building. He was stabbed at least 10 times in the chest, back and hands.