He was arrested as a suspected enemy combatant and transported to Guantanamo Bay detention camp, where he was one of nine British citizens detained. He was interviewed by representatives of MI5 and the British Foreign Office, as well as by US officials, and provided interrogators with useful information about the Taliban's methods.[8] The United States notified the Australian government of Al-Harith's detention because he had recently been in the country. The ASIO carried out an investigation of his activities while in the Australia and concluded that he had not constituted a security risk.[1] After being held for two years, during which he claimed to have experienced "cruel, inhumane and degrading treatment",[1] he was released without charge.