Three grisly killings were uncovered in Hong Kong yesterday, a day after a businessman was gunned down in his office. A man believed to be a South Korean businessman was found dead in his Tsim Sha Tsui home, apparently bludgeoned to death with a hammer, and the naked body of a woman was found buried on a Tsuen Wan hillside. Later in the day, the badly decomposed body of a man with electrical wires tied around his neck, hands and feet was found dumped in thick undergrowth on a hillside in Lau Fau Shan, Yuen Long. Police have arrested a man in connection with the woman's death but have no leads yet on the Korean man's death. An identity card was found on the second man, believed to be an Indian national, but his identity has not yet been established. Police believe he had died a few weeks ago. The cases were revealed as Commissioner of Police Tsang Yam-pui emphasised his concern over the apparent execution-style killing of a businessman in Lok Ma Chau on Monday, putting police on alert at border checkpoints. The 57-year-old South Korean was found dead in the eighth-floor unit of his apartment block in Carnarvon Road at about 11.30am. Police were alerted by neighbours who complained of a foul odour. Firemen broke in and found the body lying face-down with a bloodstained hammer nearby. A South Korean passport was found in his trouser pocket, but police said the body had decomposed beyond recognition. 'The man was found with his hands tied behind his back and wounds on his head. Initial investigations believe that he had been dead for about a week,' an officer said. 'We are still trying to contact the relatives of the passport holder in an attempt to identity him.' Neighbours said the man who lived in the apartment, whom they knew only as Mr Kim, had been in Hong Kong for about 10 years. The woman was identified as mainland immigrant Chow Siu-li, 34. She was found buried in a hillside by her 52-year-old husband. The body was discovered about 10 metres behind their hut in Sheung Kok Shan Tsuen, Tsuen Wan. According to police, Chow was naked, with an abrasion on her neck. Police arrested the couple's co-tenant, 44, at the scene. The police chief tried to deflect attention from the shocking nature of the crimes, saying homicide numbers were down this year. In the first five months, 23 murder cases were recorded, compared with 29 in the same period last year. Last year saw 69 homicides. Meanwhile, police have been placed on alert at border checkpoints to find the killer of businessman Man Kam-po, 41, who was shot dead in the office of his car park in Lok Ma Chau on Monday. A police source said the victim had been involved in business disputes. Man is believed to have run at least four car parks with different business partners.