The Consumer Council is to investigate the circumstances that led to a five-year-old boy being badly hurt in supermarket accident. The incident, at the Carrefour Hypermarket in Tsuen Wan, occurred on Sunday when a trolley the boy was sitting in became stuck on a moving ramp and overturned. The boy's mother was riding down the ramp when the trolley's front wheels became trapped. The boy fell and suffered a cut to his genitals. Doctors at Yan Chai Hospital did not want to disclose the boy's condition but it was understood surgery was carried out on Sunday night. The Consumer Council's chief research and testing officer, Connie Lau Yin-hing, said the council would investigate to see whether the supermarket had done enough to prevent the tragedy. The watchdog body conducted a survey of signs and labelling for the proper use of shopping carts in five supermarket chains three months ago, including Carrefour Hypermarket. The supermarket was found to have neither labels on the carts nor warning notices around the store. A Carrefour spokesman said that since the survey, remedial work had been undertaken. 'We are sorry for the boy. But it was an accident. We have already sent our regards to the family and will try our best to prevent a similar tragedy,' the spokesman said.