The scene of last week's Tuen Mun bus tragedy was blocked to traffic for five hours yesterday while police reconstructed the accident that killed 21 people. Fronm midnight to 5am, a double-decker bus with sand bags on seats and an empty container truck pieced together the final moments of the crash on Tuen Mun Road which has left 18 passengers in hospital. Two men and a woman remain in critical condition. The sandbags simulated the weight of the passengers to see how the bus would react under heavy breaking. A double-decker Kowloon Motor Bus vehicle plunged 50 metres off the elevated road after colliding with a container truck last Thursday. The crash was the most serious traffic accident and one of the worst disasters in terms of lives lost for at least three decades in Hong Kong. Hours after yesterday's reconstruction, the 21 people who perished were honoured by relatives and monks at a soul-pacifying ceremony. More than 100 Buddhist followers, along with 20 relatives of victims, attended the three-hour ceremony at Western Temple in Tsuen Wan. The relatives, who had applied for financial assistance to pay burial and living expenses, received a pledge from the Director of Social Welfare, Carrie Lam Cheng Yuet-ngor, that they would benefit from a $510,000 fund. Mrs Lam said other relatives also would receive compensation from the fund if their applications were approved.