TEHRAN — Iran has designated the British Royal Navy and Royal Air Force as "terrorist organizations" and labeled the UK intelligence agency MI6 a "hostile group," according to statements from the Iranian Foreign Ministry carried by state and international media. The designations were announced as a retaliatory measure against what Tehran described as London's "malicious actions" against the Islamic Republic, the official Islamic Republic News Agency (IRNA) reported. The move follows escalating tensions between the two countries.