The leader of an Islamist militant gang has been detained in the autonomous Russian republic of Dagestan, Interfax news agency said Monday. The Degestani department of Russia's Federal Security Service, also known as the FSB, the Stavropol Territorial Department and the Dagestani Interior Ministry detained Islam Batsiyev, the self-styled emir of Khasavyurt Jamaat, in the village of Kachaloi in Dagestan's Babayurt district on Sunday, the Dagestani FSB department told the news agency.