LONDON – Britain ordered all Iranian diplomats out of the U.K. within 48 hours and shuttered its ransacked embassy in Tehran on Wednesday, in a significant escalation of tensions between Iran and the West.

The ouster of the entire Iranian diplomatic corps deepens Iran’s international isolation amid growing suspicions over its nuclear program. At least four other European countries also moved to reduce diplomatic contacts with Iran.

The British measures were announced by Foreign Secretary William Hague, who said Britain had withdrawn its entire diplomatic staff after angry mobs stormed the British Embassy compound and a diplomatic residence in Tehran, hauling down Union Jack flags, torching a vehicle and tossing looted documents through windows.

The hours-long assault Tuesday was reminiscent of the chaotic seizure of the U.S. Embassy in 1979.

“The idea that the Iranian authorities could not have protected our embassy or that this assault could have taken place without some degree of regime consent is fanciful,” Hague told lawmakers in the House of Commons.

The diplomatic fallout from the attack quickly spread to other Western countries with embassies in Iran. Norway announced it was temporarily closing its embassy as a precaution, and Germany, France and the Netherlands all recalled their ambassadors for consultations.

Iran currently has 18 diplomats in Britain. About 24 British Embassy staff and dependents were based in Tehran.