Police investigating the death of a woman initially thought to have been killed now suspect she may have jumped off a Tsuen Wan flyover in a suicide bid. Ha Wai-lan, 25, was found half naked and unconscious outside the West Rail Tsuen Wan station about 10 metres below a flyover at 3.30am on Saturday. She died in Yan Chai Hospital just after 6am the same day. It had initially been suspected that she was sexually assaulted and killed. Police now say she was not raped, but are not ruling out any other possibilities, including that she was attacked. Officers yesterday interviewed friends, colleagues and relatives of Ha, hoping to shed light on the case. A police spokesman said Ha suffered a broken pelvis and had died of internal bleeding. 'It is possible that the victim jumped off the flyover to commit suicide. Bruises found on her body could have been caused by internal bleeding and her broken pelvis could be the result of a fall,' an investigator added. 'If so, we have to find out how she reached Tsuen Wan and why she wanted to end her life.' Another officer said police were looking at all possible scenarios and it was too early to conclude what had happened. Police said no weapons were found at the scene, and relatives say Ha was slightly retarded. The woman, who lived with her parents in Tai Hing Estate, Tuen Mun, disappeared on Friday night after having dinner with her parents in the area. She left alone at 8.45pm and told her mother she was going home. Her mother, 47, reported her missing just before 2am on Saturday after she failed to return home. Police have not officially classified the case, but officers said they were treating her death as suspicious. Meanwhile, police were still looking for a man wanted in connection with the killing of a logistics company clerk in Shamshuipo. Wong Siu-ping, 40, died after being found unconscious in a pool of blood in a first-floor office on Fuk Wa Street on Saturday morning. Police said she had a deep cut to her throat and some of her belongings were stolen. The suspect was recorded by security cameras, though he was wearing a mask.