People fill in documents to apply for Russian passports outside a local residents' registration office in the Crimean city of Simferopol April 7, 2014. Pro-Russian protesters who broke into state security headquarters in the eastern Ukrainian city of Luhansk have seized weapons, and highway police have closed down entrances into the city, local police said on Monday. Demonstrators in Donetsk and Luhansk demanded a referendum be carried out on whether to join Russia like that held in Crimea that paved the way for its annexation by Russia. REUTERS/Maxim Shemetov (UKRAINE - Tags: POLITICS SOCIETY)