The death of a four-year-old boy who fell into a pyramid-shaped decorative pool in November last year while playing was an accident, an inquest found yesterday. Kwan Chun-wai was playing around the pool at Butterfly Estate, Tuen Mun, when he fell in and hit the back of his head on a hard object on November 23. He was taken to Tuen Mun Hospital with a head injury and died a week later. The five-member jury in the inquest determined unanimously that the cause of the boy's death was a brain injury caused by a foreign object and drowning, and that the boy fell into the pool by accident, before sustaining the brain injury and drowning. In delivering its decision, the jury suggested that the Housing Authority should strictly monitor the management companies it contracts, review the pool's design and put a barrier around it, and that parents and guardians should teach their children to stay safe. The boy's father, Guan Zhenquan, a mainlander, and his mother, who was not identified in court, wept as the jury read its decision. They declined to say if they would appeal against the decision. Earlier, Tuen Mun Hospital clinical pathologist Yuen Kai-tak told the inquest that Kwan had sustained a fracture and large bruise to his skull behind his right ear. Dr Yuen suggested that the boy had received a blow from a round, curved object when he fell sideways to his right while standing on the lowest level of the terraced pool. Kwan's maternal grandmother, Zhang Lianhe, 60, said her grandson had asked to play near the pool with other children after she had picked him up from school. She remembered seeing him 10 minutes after he started playing, but after another five minutes, she noticed he was missing. Sensing something was wrong, she asked for help. A passer-by eventually found and retrieved him from the pool. Tuen Mun Hospital paediatrician Lui Ying-shun told the court that when the boy arrived at the emergency room, he was unconscious. His heart stopped beating before starting again and beating irregularly. Doctors placed him in the intensive care unit. Scans of his brain and brain stem revealed an injury, and he was certified brain-dead, she said.