A tragic incident at a Riverstone restaurant has left one man dead and seven others, including five police officers, hospitalised following a suspected gas leak. Emergency services were called to the Haveli Indian restaurant in north-west Sydney late Monday night after reports of a strong gas smell inside the premises. The death has shocked the local community, with Riverstone residents expressing sadness at the loss of a young life and concern for the first responders who became unwell while trying to help. Authorities are urging all businesses and households to ensure their gas systems are regularly inspected and that workplaces have adequate ventilation. The Hawkesbury community extends its deepest sympathies to the family and friends of the young man whose life was cut short in this tragedy.