A 14-year-old schoolgirl plunged to her death from a public housing block in Tsing Yi yesterday. Chu Ying-ying of Buddhist Sin Tak College was found lying unconscious outside King Fat House, Cheung Fat Estate at about 10.45am. She was taken to Princess Margaret Hospital where she was declared dead. Her mother told police she was an outpatient of South Kwai Chung mental hospital and said she had been suffering from studying-related stress. She is the ninth student to commit suicide since the academic year began in September.