Police in Osaka Prefecture, western Japan, have obtained an arrest warrant for a Tokyo resident on suspicion of attempted murder of a police officer and theft of his loaded handgun.
The officer, Suzunosuke Kose, was found stabbed at around 5:30 a.m. on Sunday near the police box in Suita City where he had been on duty. His handgun loaded with five bullets was also stolen.
The officer remains unconscious with stab wounds in the chest and six other locations on his body.
Police released images taken by the police box's closed-circuit camera of a man acting in a suspicious manner. Investigative sources say police believe that this man attacked the officer.
Police identified him as Yujiro Iimori -- a 33-year-old resident of Tokyo's Shinagawa Ward. They say that after disclosing the images, they received a call from a person who said the man looked like his son.
Sources say the suspect lived in Suita City until graduating from senior high school. This suggests he was familiar with the area.
Police say a man resembling the suspect was spotted near a train station about one kilometer west of the crime scene shortly after the attack occurred.
At around 9 a.m., he allegedly bought a hat and a jumper at a shopping mall near another station about five kilometers north of the crime scene.
Police are asking people to come forward if they see anyone wearing such clothing.
Police are also calling on local residents to stay on the alert and refrain from going out unless absolutely necessary.