An 11-year-old boy died in hospital yesterday, a day after being crushed by a lift in a freak accident on a luxury private housing estate in Fanling. Lui Kam-ho was certified dead shortly after 8am after being admitted to Prince of Wales Hospital in Sha Tin in a critical condition the previous evening. The tragedy has prompted the police and government engineers to launch an investigation, the findings of which will be passed to the coroner. The boy's upper body was trapped for nearly 30 minutes between the lift floor and the top of the door frame on Tuesday before firemen and lift engineers freed him on the 17th floor of a block at the Belair Monte in Ma Sik Road. He apparently darted into the lift when it arrived on the 17th floor but found it was still going up. He leaned out, stopping the doors closing, but was too scared to jump. His mother tried in vain to take his hands to pull him from the lift. Sheung Shui police and engineers from the Electrical and Mechanical Services Department examined the lift yesterday. The accident happened four months after a new lift maintenance contractor, King Rise E & M Engineering, was hired to run all 21 lifts in seven blocks on the estate, according to the estate's management company, Urban Property Management. A spokesman for Urban Property said the maintenance contractor had certified the lift involved in the accident safe on December 26, and that its services would be retained unless official findings discovered King Rise was at fault. The findings will be available in two weeks. He said maintenance checks on all lifts on the estate were carried out twice a month, above the legal requirement of once a month. Tuesday's accident would be covered by third-party liability insurance. In a statement last night, King Rise said it could not comment while an official investigation was continuing. A senior department inspector, Tang Chung-sing, said a team of engineers had checked the lift. He declined to say what might have caused the accident. 'We have checked the lift control wiring, the lift door mechanics and other mechanical aspects of the lift's system,' Mr Tang said at the accident site yesterday. Police said no criminal element was involved in the accident and the investigation was being carried out to gather evidence for an expected coroner's hearing. The Fanling estate opened to tenants in mid-1999 and the original lift manufacturer, Schindler Lifts, serviced the lifts until September when King Rise took over on a two-year contract after a public tender. King Rise services were slightly cheaper than Schindler's, according to Urban Property Management. There were no serious lift accidents involving deaths or serious injuries last year. The department's inspectors carry out random checks on 10 per cent of the territory's 40,000-plus commercial and residential lifts each year.