Iranian Embassy siege The Iranian Embassy siege took place from 30 April to 5 May 1980, after a group of six armed men stormed the Iranian embassy in South Kensington, London. The gunmen took 26 people hostage—mostly embassy staff, but several visitors and a police officer, who had been guarding the embassy, were also held. The hostage-takers, members of an Iranian Arab group campaigning for Arab national sovereignty in the southern region of Khūzestān Province, demanded the release of Arab pris