HASSAN v. THE UNITED KINGDOM – JUDGMENT 41 they were in occupation, and before the United Kingdom had assumed responsibility for the maintenance of security in the South East of the country (see Al-Skeini, cited above, §§ 10-11). However, as in Al-Skeini, the Court does not find it necessary to decide whether the United Kingdom was in effective control of the area during the relevant period, because it finds that the United Kingdom exercised jurisdiction over Tarek Hassan on another ground. 76. Following his capture by British troops early in the morning of 23 April 2003, until he was admitted to Camp Bucca later that afternoon, Tarek Hassan was within the physical power and control of the United Kingdom soldiers and therefore fell within United Kingdom jurisdiction under the principles outlined in paragraph 136 of Al-Skeini, set out above. The Government, in their observations, acknowledged that where State agents operating extra-territorially take an individual into custody, this is a ground of extra-territorial jurisdiction which has been recognised by the Court. However, they submitted that this basis of jurisdiction should not apply in the active hostilities phase of an international armed conflict, where the agents of the Contracting State are operating in territory of which they are not the occupying power, and where the conduct of the State will instead be subject to the requirements of international humanitarian law. 77. The Court is not persuaded by this argument. Al-Skeini was also concerned with a period when international humanitarian law was applicable, namely the period when the United Kingdom and its coalition partners were in occupation of Iraq. Nonetheless, in that case the Court found that the United Kingdom exercised jurisdiction under Article 1 of the Convention over the applicants’ relatives. Moreover, to accept the Government’s argument on this point would be inconsistent with the case-law of the International Court of Justice, which has held that international human rights law and international humanitarian law may apply concurrently (see paragraphs 35-37 above). As the Court has observed on many occasions, the Convention cannot be interpreted in a vacuum and should so far as possible be interpreted in harmony with other rules of international law of which it forms part (see, for example, Al-Adsani v. the United Kingdom [GC], no. 35763/97, § 55, ECHR 2001-XI). This applies equally to Article 1 as to the other articles of the Convention. 78. With regard to the period after Tarek Hassan entered Camp Bucca, the Government raise an alternative ground for excluding jurisdiction, namely that his admission to the Camp involved a transfer of custody from the United Kingdom to the United States. However, notwithstanding the Government’s textual arguments based on the terms of the MOA and on Article 12 of the Third Geneva Convention (see paragraphs 16, 33 and 72 above), the Court is of the view that, having regard to the arrangements operating at Camp Bucca, during this period Tarek Hassan continued to fall under the authority and control of United Kingdom forces. He was admitted