A veteran police officer died after shooting himself in the head with his service revolver at Tsuen Wan police station yesterday - the second officer to commit suicide within four days. Sergeant Wong Sin-ho, 51, a divorced father-of-one, was on duty when he was found by a colleague lying unconscious with a gunshot wound to the head in a 12th-floor rest room of the police station in Tsuen King Circuit at 2.50am. 'He fired one shot into his right temple and his service revolver was still in his hand. No one from the police station heard a gunshot. Initial investigations showed he shot himself between 1am and 2am,' Assistant Tsuen Wan District Commander (Crime) Superintendent Cheung Koon-wah said. 'No suicide note was found. We are still investigating why he committed suicide. His colleagues told us that he had not been acting strangely.' The officer, who was attached to the patrol sub-unit of Tsuen Wan police station, was certified dead at the scene and initial investigation showed there were no suspicious circumstances. He had been in the force for more than 30 years and worked on contract after retiring about six years ago, being transferred to Tsuen Wan police station two months ago. Wong, who had been divorced for several years, is survived by his daughter. He lived with his girlfriend, who was on the mainland yesterday. A police source said Wong had apparently planned to commit suicide as he had made a will through a lawyer last month and had recently sold his car. Wong is the third police officer to commit suicide this year. Last year eight policemen killed themselves, while six others took their lives in 2000. On Sunday, a detective who failed to report for duty was found dead in Kwai Hing. Police said Tam Kwok-hung, 31, jumped from the 24th floor of Hing Kwok House in Kwai Hing Estate. A police source said the officer had returned to Hong Kong on Sunday after making a visit to Macau. Police Commissioner Tsang Yam-pui said yesterday the suicide problems in the force more or less reflected problems in the society. 'We attach great importance to the situation. We hope this will not become a trend,' he said. Mr Tsang said past suicide cases of officers were mostly linked with financial or personal relationship problems. The number of counselling cases handled by a team of six psychologists in the force rose by 21 per cent from 1,995 in 2000 to 2,314 last year. There were 1,926 cases in 1999.