An old man living illegally on a rooftop was shot dead by police when he attacked an officer with a chopper. The man was killed by two bullets to the chest after ignoring warnings to put down the weapon, an inquest heard yesterday. No identification could be found in the wooden hut he occupied on top of a building in Hong Lok Street, Mongkok. Efforts to identify the man since the shooting, on September 21 last year, had failed, the hearing was told. But a welfare group caring for street sleepers revealed he had been known as 'old Mr Hung'. The man, thought to be aged 50 to 60, was discovered by a security guard, Leung Kai-chiu, as he patrolled the building. Mr Leung, 33, said the man became agitated and started to curse him after he was asked why he was trespassing on private property. The guard decided to leave the scene, but before he could proceed downstairs the man attacked him from behind, hitting him with a paint scraper. Mr Leung suffered bruising on his shoulder. He returned to the roof with three police officers and they found the man brandishing a chopper. 'The policeman at the front asked him for an identity card and he said he didn't have one,' Mr Leung told the hearing. 'Then he shouted repeatedly at the officers that they had killed his mother. 'He was warned to put down the chopper, but he ignored the orders and chopped at a police officer.' One of the officer's colleagues fired when the street sleeper attacked and pulled the trigger again when the man failed to put down the weapon, the hearing was told. Welfare group worker Chau Shu-tak said he had known the deceased since the 1980s. 'He never said a word about his family. I think he suffered from psychiatric problems,' Mr Chau said. The hearing continues.