The Fire Services Department (FSD) received the report of gas attack at an entrance of the Legislative Council Complex at 3.34pm today (July 1), with policemen felt unwell after inhaling of smoke. The FSD deployed five fire appliances and three ambulances to the scene. Two policemen were sent to Queen Mary Hospital for treatment.
As white powder was found at the scene, the FSD deployed the Hazardous Materials (HazMat) Team to handle the incident. The HazMat Team detected that the white powder was p-phenylenediamine (dangerous goods in category 4).
P-phenylenediamine is a poisonous substance. After a long exposure, it may cause itchy eyes, skin redness and swelling, and shortness of breath. Inhalation of large amounts of the substance may also cause serious skin and respiratory tract burns.
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