""Kurdish security officials speaking on the condition of anonymity said that Thursday night saw the execution of a security plan in which Arab Sunnis_of which there are tens of thousands as refugees in the Kurdisn areas_that have been under observation were being arrested in a series of raids throughput the area. Plainclothes Kurdish security forces could be seen in unmarked cars throughout may areas of the capital, as, according to the officials, steps were taken to prevent ‘sleeper cell’ attacks inside the city.""