In two cases in 24 hours, youngsters prevent tragedy Two children foiled a suicide attempt by their mother and saved their own lives early yesterday - the second time in 24 hours that youngsters have averted a family tragedy. The 11-year-old boy and his eight-year-old sister were sleeping with their mother in their Sha Tin flat when they awoke about 1am to find the room full of smoke. Their 34-year-old mother, distraught after an argument with her husband, 48, had written a suicide note and set charcoal alight in the room in Oak House, Kwong Yuen Estate, Siu Lek Yuen. The children rushed to another bedroom and alerted their father, who put out the fire before police arrived. Suffering from smoke inhalation, the children and their mother were taken to Prince of Wales Hospital where they remained in stable condition last night. Police said the couple had argued before the suicide attempt. Twenty-four hours earlier, at May Shing Court in Tai Wai, an eight-year-old boy called the police after witnessing a bloody double-suicide attempt by his parents. The drama began when the boy's 31-year-old mother took a dozen sleeping pills after an argument with her husband, 19 years her senior. The man became upset and stabbed himself several times with a knife before trying to jump from a window. Police arrived in response to the boy's 999 call to find the woman holding a chopper. Officers managed to persuade her to drop the chopper and the couple were taken to hospital where their conditions were reported as not life threatening. The boy was being cared for by relatives. Raco Cheng, a supervisor at the Harmony House support group for victims of domestic abuse, warned that children witnessing such acts were likely to carry emotional scars that would affect their outlook on life. 'A lot of research, local and overseas, has indicated it will have an effect on their psychological development,' he said. 'For example, their academic performance will suffer a sudden dip and they can easily become agitated to the extreme.' Meanwhile, a woman, 23, was in critical condition at Prince of Wales Hospital after breaking her legs as she plunged four floors to the ground at Sha Tin Centre following a row with her boyfriend.