In September 1860, during the closing stages of the Second Opium War, the British diplomatic envoy Harry Parkes was arrested along with other hostages, who were tortured and executed. In retaliation, British and French troops under the command of Lord Elgin attacked Beijing, and by the following month they had burned the Old Summer Palace to the ground. The Xianfeng Emperor and his entourage, including Cixi, fled Beijing to Rehe Province (around present-day Chengde, Hebei). On hearing the news of the destruction of the Old Summer Palace, the Xianfeng Emperor, who was already showing signs of dementia, fell into a depression. He turned heavily to alcohol and drugs and became seriously ill. He summoned eight of his most prestigious ministers, headed by Sushun, Zaiyuan and Duanhua, and named them the "Eight Regent Ministers" to direct and support the future emperor. The Xianfeng Emperor died on 22 August 1861 at the Chengde Mountain Resort in Rehe Province.