The uncle of a mainland student who died in hospital yesterday, has been devoured by guilt because he said he could have prevented the death. Xie Ziyang, 19, was hit by a woman who landed on him after she plunged from a public housing block in Chai Wan on Monday afternoon. Xie, a visitor from Anhui province, was declared dead in Pamela Youde Nethersole Eastern Hospital yesterday morning.He was walking with his grandmother beside Sui Shing House at Siu Sai Wan Estate when the woman, 39, fell from the 26th floor public corridor of the building and struck him. His 67-year-old grandmother, also from the mainland, was not hurt. She was treated for shock in hospital and discharged. The woman who landed on Xie was declared dead at the scene. Police found a suicide note in her second-floor flat. Xie suffered multiple injuries and was semi-conscious in the ambulance, police said. One of his relatives said yesterday that his condition had deteriorated by Monday night because of injuries to his brain. His uncle, who lives in the city, said Xie was a post-secondary student and was in Hong Kong to visit relatives. "He was an elite, hardworking mechanical engineering student and also a good boy," he said, adding that it was Xie's first visit to the city. The uncle said he saw the woman on the 26th floor before she jumped. She had taken off her shoes and was loitering along the corridor. He asked her if she needed help but got no response. He went into a flat and called the police. But a few minutes later he got a call that Xie had been injured by a falling woman. He said he was devoured by guilt because he could have stopped the woman from jumping if he had kept an eye on her and not stepped into the flat. Xie's parents are flying in from Anhui.In April last year, a 55-year-old woman leapt to her death from the top of a block of flats in Tai Koo Shing and landed on a passer-by who died. In February 2010, a 51-year-old woman died in Ma On Shan when an elderly neighbour fell by accident and landed on her.