A man uses a fire extinguisher as members of self-defence units of the Euromaidan movement attempt to prevent members and supporters of Ukrainian far-right radical groups from taking part in a torch-light procession in Kiev
A man uses a fire extinguisher as members of self-defence units of the Euromaidan movement attempt to prevent members and supporters of Ukrainian far-right radical groups (back) from taking part in a torch-light procession in central Kiev April 29, 2014. REUTERS/Konstantin Grishin (UKRAINE - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)
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 TPX IMAGES OF THE DAY)
Members of Ukraine's State Security Administration clash with members of the Euromaidan movement's self-defence units during a rally outside the cabinet of ministers building in Kiev
Members of Ukraine's State Security Administration (R) clash with members of the Euromaidan movement's self-defence units during a rally outside the cabinet of ministers building in Kiev April 30, 2014. REUTERS/Andrew Kravchenko/Pool (UKRAINE - Tags: POLITICS CIVIL UNREST)
Members of Ukraine's State Security Administration clash with members of the Euromaidan movement's self-defence units during a rally outside the cabinet of ministers building in Kiev
Members of Ukraine's State Security Administration (top) clash with members of the Euromaidan movement's self-defence units during a rally outside the cabinet of ministers building in Kiev April 30, 2014. REUTERS/Andrew Kravchenko/Pool (UKRAINE - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)
Members of Ukraine's State Security Administration clash with members of the Euromaidan movement's self-defence units during a rally outside the cabinet of ministers building in Kiev
Members of Ukraine's State Security Administration (top) clash with members of the Euromaidan movement's self-defence units during a rally outside the cabinet of ministers building in Kiev April 30, 2014. REUTERS/Andrew Kravchenko/Pool (UKRAINE - Tags: POLITICS CIVIL UNREST)
Members of Ukraine's State Security Administration clash with members of the Euromaidan movement's self-defence units during a rally outside the cabinet of ministers building in Kiev
Members of Ukraine's State Security Administration (R) clash with members of the Euromaidan movement's self-defence units during a rally outside the cabinet of ministers building in Kiev April 30, 2014. REUTERS/Andrew Kravchenko/Pool (UKRAINE - Tags: POLITICS CIVIL UNREST)
Members of Ukraine's State Security Administration clash with members of Euromaidan movement's self-defence units during rally outside the cabinet of ministers building in Kiev
Members of Ukraine's State Security Administration (L, top, facing the camera) clash with members of the Euromaidan movement's self-defence units during a rally outside the cabinet of ministers building in Kiev April 30, 2014. REUTERS/Andrew Kravchenko/Pool (UKRAINE - Tags: POLITICS CIVIL UNREST)
Russia's Putin, Italy's Renzi says all sides must observe Ukraine deal
UKRAINE-CRISIS/RUSSIA-ITALY (URGENT):Russia's Putin, Italy's Renzi says all sides must observe Ukraine deal
INTERVIEW-Toppled 'mafia' president cost Ukraine up to $100 billion, prosecutor says
The $100 billion figure is equal to more than half the annual economic output of Ukraine in 2013