A stateless person of Palestinian origin, born in Kuwait resided in Bulgaria with his two children who were born in Bulgaria and hold Bulgarian nationality. His permanent residence permit in Bulgaria was withdrawn on the grounds that he was engaged in alleged religious extremism, and he was detained and subsequently deported to Syria. The Court held that there had been a violation of Articles 5(§4), 8, and 13 ECHR as a result of the deportation. In this judgment, the Court outlines the procedural safeguards required by the ECHR in decisions to detain a person for the purposes of deportation, including where an allegation of a threat to national security is made. The guarantee of an effective remedy requires some form of adversarial proceedings, and that the competent independent appeals authority must be able to assess whether the conclusion that a person is a threat to national security, which justifies deportation, is arbitrary or unreasonable.