Updated at 12.35pm: Heroic efforts by two young men to save an elderly woman who attempted suicide in Tuen Mun on Monday proved ineffective. Two patrol officers walking their beat near Wu Chui Road at around 6.30am saw the woman, surnamed Yong, jump into Castle Peak Bay. Two civilian witnesses to the incident, surnamed Leung and Lui, both aged 23, immediately jumped into the water to save Yong. They carried her back to the shore. She was rushed to Tuen Mun hospital, where she was pronounced dead. ''She was very depressed, but we do not know what exactly caused her to jump,'' said a police spokeswoman.