Four supporters of the Islamic State have been detained on suspicion of planning terrorist attacks in Dagestan, Russia's NAC said. The detained men, all natives of Dagestan, were held in Moscow and the republic's capital of Makhachkala on Friday and Saturday, said a statement issued by the National Anti-terrorism Committee on Saturday.The four suspects confessed that they had contacts with IS emissaries and planned terrorist attacks with home-made bombs and other weapons in crowded places, according to the statement.