Meanwhile in California about 500 mainly Iranian men have been detained after obeying a government order to register with the Immigration and Naturalisation Service (INS). Under new rules brought in as part of Washington’s domestic efforts to combat terrorism, immigrants from Iran, Iraq, Libya, Sudan and Syria who have not been naturalised were ordered to present themselves to the INS by 16 December. Officials said that the detainees were being held for immigration violations and other offences, but the move sparked angry protests on the streets of Los Angeles. About 600,000 Iranians live in California, many who have been living there since the Islamic Revolution in 1979.