Updated at 5.21pm: A motorcylist died on Friday after his bike went off a Tsing Yi flyover and landed 11 metres on the ground below. Leung Ka-hoi, 40, plunged down below the bridge while his motorbike fell onto the roof of a China Light & Power electricity sub-station. The accident happened when he was heading toward Tsing Yi about 9.30am. The motorbike went out of control and flew off the flyover connected to Tsing Yi Heung Sze Mui Road. ''It mounted a crash barrier and mowed down a traffic sign and hit a lamp post in the flyover,'' New Territories South police traffic unit inspector Chan Fat-sum said. ''The victim and his motorbike flew off in different directions. The motorcyclist was thrown to the road about 11 metres below the flyover and the bike dropped about 6m to the roof of the CLP sub-station.'' Leung was taken to Princess Margaret Hospital where he was later declared dead. Mr Chan said he believed the motorbike was travelling very fast. The speed limit is 50km/h in the flyover. In a separate accident in Chai Wan, an elderly woman was killed when she was hit by a lorry at Cheung Lee Street near Chai Wan MTR station at about 9.30am. Police questioned the 31-year-old driver and were still investigating the cause of the accident. No identification was found on the victim, believed to be aged about 70, 1.55m tall and of medium-build. She was wearing a light blue blouse, black trousers and a pair of brown slippers. Anyone who knows the victim should contact the Hong Kong Island traffic unit on tel: 2841 6400.