Russian separatists in Donetsk dig in

Pro-Russian activists rally at a barricade outside the regional state administration in the eastern Ukrainian city of Donetsk on April 11, 2014. Ukraine's embattled premier vowed on Friday to grant more power to the country's regions in a bid to stamp out a separatist insurgency that sprang up just as a new Russian gas war threatened European supplies. Prime Minister Arseniy Yatsenyuk's promise during a visit to the coal mining region of Donetsk came as militants armed with Kalashnikovs barricaded themselves inside the local government building and demanded a referendum on joining Russia. AFP PHOTO/ ANATOLII STEPANOVANATOLII STEPANOV/AFP/Getty Images
Pro-Russian activists rally at a barricade outside the regional state administration in the eastern Ukrainian city of Donetsk on April 11, 2014. Ukraine's embattled premier vowed on Friday to grant more power to the country's regions in a bid to stamp out a separatist insurgency that sprang up just as a new Russian gas war threatened European supplies. Prime Minister Arseniy Yatsenyuk's promise during a visit to the coal mining region of Donetsk came as militants armed with Kalashnikovs barricaded themselves inside the local government building and demanded a referendum on joining Russia. AFP PHOTO/ ANATOLII STEPANOVANATOLII STEPANOV/AFP/Getty Images

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    Russian separatists in Donetsk dig in

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CNN's Nick Paton Walsh looks at the power struggle in Donetsk, Ukraine where pro-Russia protesters continue to hold out.