Police are questioning a man and his wife after their four-year-old daughter choked to death while she was eating buns at their home in Ngau Tau Kok. Lo Fung-ying choked while being fed by her 28-year-old mother at Yee On Street at about 8.20pm. She could not breathe or speak, and her mother asked her husband to call an ambulance. The girl was rushed to United Christian Hospital, where she was declared dead at 9.31pm. Her mother told police that her daughter had been ill with influenza for a few days and had suffered from vomiting and diarrhoea. Police said they asked the 33-year-old father about bruises on the girl's head and arms, but he said he did not know what caused them. The couple was taken, with their faces covered, to a police station late last night. League of Social Democrats health spokesman Lo Wing-lok said bread was not an ideal food for sick or recovering children. Dr Lo, a former medical sector legislator, said a healthy four-year-old was more than able to take bread and food of various kinds. But if they were suffering from asthma or other respiratory ailments, they might suck food into their airways and choke. He reminded the public, especially parents, to learn first aid so that they could apply the right assistance if someone choked. A blocked airway could kill a person within three minutes, Dr Lo said. Small food items like candies were not recommended for toddlers, he added.