A pro-Russian masked man looks through a broken window of the seized regional prosecutor's office in Luhansk
A pro-Russian masked man looks through a broken window of the seized regional prosecutor's office in Luhansk, eastern Ukraine, April 30, 2014. Hundreds of pro-Moscow separatists stormed government buildings in one of Ukraine's provincial capitals on Tuesday and opened fire on police holed up in a regional headquarters, a major escalation of their revolt despite new Western sanctions on Russia. REUTERS/Vasily Fedosenko (UKRAINE - Tags: POLITICS CIVIL UNREST)
Pro-Russian armed man stands guard in the seized regional prosecutor's office in Luhansk
A pro-Russian armed man stands guard in the seized regional prosecutor's office in Luhansk, eastern Ukraine, April 30, 2014. Hundreds of pro-Moscow separatists stormed government buildings in one of Ukraine's provincial capitals on Tuesday and opened fire on police holed up in a regional headquarters, a major escalation of their revolt despite new Western sanctions on Russia. REUTERS/Vasily Fedosenko (UKRAINE - Tags: POLITICS CIVIL UNREST)
A masked pro-Russian protester poses inside a regional government building in Donetsk
A masked pro-Russian protester sits beside a dog as he poses for a picture inside a regional government building in Donetsk, eastern Ukraine April 25, 2014. Picture taken April 25, 2014. REUTERS/Marko Djurica (UKRAINE - Tags: POLITICS CIVIL UNREST ANIMALS PORTRAIT)
Pro-Russian armed men stand in the seized regional prosecutor's office in Luhansk
Pro-Russian armed men stand in the seized regional prosecutor's office in Luhansk, eastern Ukraine, April 30, 2014. Hundreds of pro-Moscow separatists stormed government buildings in one of Ukraine's provincial capitals on Tuesday and opened fire on police holed up in a regional headquarters, a major escalation of their revolt despite new Western sanctions on Russia. REUTERS/Vasily Fedosenko (UKRAINE - Tags: POLITICS CIVIL UNREST)
A masked pro-Russian protester poses inside a regional government building in Donetsk
A masked pro-Russian protester sits on a chair as he poses for a picture inside a regional government building in Donetsk, eastern Ukraine April 25, 2014. Picture taken April 25, 2014. REUTERS/Marko Djurica (UKRAINE - Tags: CIVIL UNREST POLITICS PORTRAIT)
Pro-Russian armed men stand in the seized regional prosecutor's office in Luhansk
Pro-Russian armed men stand in the seized regional prosecutor's office in Luhansk, eastern Ukraine, April 30, 2014. Hundreds of pro-Moscow separatists stormed government buildings in one of Ukraine's provincial capitals on Tuesday and opened fire on police holed up in a regional headquarters, a major escalation of their revolt despite new Western sanctions on Russia. REUTERS/Vasily Fedosenko (UKRAINE - Tags: POLITICS CIVIL UNREST)
Pro-Russian armed men stand in the seized regional prosecutor's office in Luhansk
Pro-Russian armed men stand in the seized regional prosecutor's office in Luhansk, eastern Ukraine, April 30, 2014. Hundreds of pro-Moscow separatists stormed government buildings in one of Ukraine's provincial capitals on Tuesday and opened fire on police holed up in a regional headquarters, a major escalation of their revolt despite new Western sanctions on Russia. REUTERS/Vasily Fedosenko (UKRAINE - Tags: POLITICS CIVIL UNREST)
A woman leaves a building of the regional government headquarters as pro-Russian armed men sit at its entrance in Luhansk
A woman leaves a building of the regional government headquarters as pro-Russian armed men sit at its entrance in Luhansk, eastern Ukraine, April 30, 2014. Hundreds of pro-Moscow separatists stormed government buildings in one of Ukraine's provincial capitals on Tuesday and opened fire on police holed up in a regional headquarters, a major escalation of their revolt despite new Western sanctions on Russia. REUTERS/Vasily Fedosenko (UKRAINE - Tags: POLITICS CIVIL UNREST)
Woman walks in front of the seized regional government headquarters in Luhans
A woman walks in front of the seized regional government headquarters in Luhansk, eastern Ukraine, April 30, 2014. Hundreds of pro-Moscow separatists stormed government buildings in one of Ukraine's provincial capitals on Tuesday and opened fire on police holed up in a regional headquarters, a major escalation of their revolt despite new Western sanctions on Russia. REUTERS/Vasily Fedosenko (UKRAINE - Tags: POLITICS CIVIL UNREST)
Women walk in front of the seized regional government headquarters in Luhans
Women walk in front of the seized regional government headquarters in Luhansk, eastern Ukraine, April 30, 2014. Hundreds of pro-Moscow separatists stormed government buildings in one of Ukraine's provincial capitals on Tuesday and opened fire on police holed up in a regional headquarters, a major escalation of their revolt despite new Western sanctions on Russia. REUTERS/Vasily Fedosenko (UKRAINE - Tags: POLITICS CIVIL UNREST)