Sovereignty of the Falkland Islands 'rests with the UK', Downing Street has said, following a report the US could review its position on Britain's claim to the territory. An internal Pentagon email reported by Reuters suggested the US was considering options to punish NATO allies it believed had failed to support its war on Iran. The options discussed also included seeking Spain's suspension from NATO over its opposition to the war. A Pentagon spokesperson did not comment on the email's existence, but said it would 'ensure that the president has credible options to ensure that our allies are no longer a paper tiger'. The Falkland Islands, a British overseas territory in the south-west Atlantic Ocean, remain the subject of a sovereignty dispute between Britain and Argentina. A No 10 spokesman stated: 'The Falkland Islands have previously voted overwhelmingly in favour of remaining a UK overseas territory, and we've always stood behind the islanders' right to self-determination and the fact that sovereignty rests with the UK.' The prime minister’s official spokesman further emphasized the UK's longstanding position on sovereignty and self-determination. Historically, Argentina has claimed the islands based on its proximity and as an inheritance from the Spanish crown. In 1982, the sovereignty dispute escalated into a conflict following Argentina's invasion, resulting in a military engagement led by the UK. Since then, the Falkland Islanders have consistently expressed their wish to remain as a British territory through referendums and public sentiment.