A water department worker struck by a 20kg stopcock that shot from a burst water main on Monday died of his injuries in hospital last night hours after another burst underground water pipe caused traffic chaos in Kowloon. Hung Kee-hung, 56, a workman from the Water Supplies Department, died at 6.43pm yesterday at Pamela Youde Nethersole Eastern Hospital. He had been in critical condition since being struck on the head by the stopcock at Heng Fa Chuen. Director of Water Supplies Chan Chi-chiu last night expressed his condolences to the family and said the department would provide any possible assistance. Traffic was severely disrupted yesterday after a freshwater pipe burst in Tsim Sha Tsui at 6.30am. The 25-year-old underground pipe began gushing water onto Nathan Road between Salisbury and Middle roads - one of West Kowloon's busiest intersections. The Transport Department established a special unit to monitor traffic. The road was closed to vehicles and 25 bus routes were affected. The road reopened at about 4pm. Water supplies to homes, offices and hotels in the area were not affected, as the pipe supplied water only to the Cultural Centre and a Salisbury Road department store. Tankers were deployed until the water supply returned to normal at 1pm. Sandbags were placed around the Peninsula and Sheraton hotels to prevent flooding as the water level rose by more than 30cm. Chan Shu-pui, the Water Supplies Department's chief engineer for Kowloon, said the pipe in Tsim Sha Tsui was scheduled to be replaced in July. 'We inspected the pipe regularly but found no problem. But then it broke by accident after all,' he said. 'No one could have expected it.' The water department said the road would be partially closed again last night as workers needed to make repairs, but it expected the road to be fixed before today's rush hour. The department said that in the past two years there were on average 111 burst mains per month resulting in suspensions of water supply.