A family of four still devastated by the death of their youngest daughter from cancer two years ago tried to kill themselves yesterday in their Tai Po home. The family - a couple and their two grown-up children - swallowed tablets with wine, sealed their 22nd-floor flat on Tai Yuen Estate and burned charcoal in the suicide attempt. They took about 100 headache painkillers and flu tablets with red wine before setting charcoal alight in two stoves in the centre of the living room to gas themselves, leaving notes and documents on a table. About an hour later, the 66-year-old father, Lau Pui-chuen, apparently changed his mind. He managed to leave the fume-filled unit to seek help from his neighbour, who called police. The retired waiter, his wife, Lui Bing-sum, 51, and son Lau Kam-wing, 29, were conscious and his daughter, Lau Suk-yee, 28, was in a semi-conscious state when emergency services arrived. They were taken to Alice Ho Miu Ling Nethersole Hospital, where Ms Lui was last night in a serious condition and the other three were stable. A police spokeswoman said the family missed the youngest daughter, who died of a lung disease two years ago. She was in her 20s. Yesterday's incident came about three months after the son quit his job as a bank clerk. The daughter is also jobless and the mother is a housewife. 'Initial investigations show that the family has a very good relationship,' a police source said. 'The couple and their children felt very depressed after their youngest daughter died. They think they are useless and unable to help her, so they tried to commit suicide. It's a very sad family case.' Investigations revealed that the family had bought charcoal and stoves about two months ago. There were no suspicious circumstances. The family has no debt problems. Police said the Social Welfare Department had been asked to help the family. Hotline numbers: Samaritans (multi-lingual) 2896 0000, and Samaritan Befrienders (Cantonese) 2389 2222.