WATCH: Hong Kong policeman punched in Chungking Mansions A vicious attack in which a policeman was punched repeatedly in the face and head was captured by CCTV in Tsim Sha Tsui on Tuesday. The officer was struck nine times before the attacker was subdued by his partner and a passerby in Chungking Mansions – a high-rise warren of cheap guest houses and South Asian restaurants – on Nathan Road. The constable, who is attached to the patrol sub-unit of Tsim Sha Tsui police station, was on patrol with his partner in the building when the incident happened shortly after 10.15am. When the officer noticed a dispute at a money exchange shop on the ground floor of the building, he went to investigate, according to a police spokeswoman. A video clip shows the officer approached a man wearing a green and black jacket – later identified by police as a 35-year-old Hong Kong identity card holder – when he banged the shop’s glass security screen. In the 27-second clip, the officer was assaulted after he grabbed the man’s shoulder from behind. The film shows the man then landed nine punches on the officer, whose hat fell off. The video shows the officer clung onto the man’s jacket throughout the eight-second long attack. The attack ended when the man was pushed to the ground by a man who was passing by and subdued by a security guard and the officer’s partner. The injured policeman was treated for facial injuries at Queen Elizabeth Hospital in Yau Ma Tei. According to police, an initial investigation showed the suspect became emotional because he waited for a long time to exchange money at the shop. The man was also accused of damaging the padlock of the security screen at the money exchange shop, a police spokeswoman said. Police arrested him on suspicion of assaulting a police officer and criminal damage. At about 4pm, he was being held for questioning at Tsim Sha Tsui police station. He had not been charged. Detectives from the Yau Tsim police district are investigating.