Acting head of Ukraine's Security Service, Valentin Nalivaichenko speaks during a session at the Parliament in Kiev on February 23, 2014. A new era dawned in Ukraine on February 23 when parliament appointed a pro-Western interim leader after impeaching a defiant president Viktor Yanukovych, whose whereabouts remain a mystery following a week of carnage. AFP PHOTO/ SERGEI SUPINSKY

Acting head of Ukraine's Security Service, Valentin Nalivaichenko speaks during a session at the Parliament in Kiev on February 23, 2014. A new era dawned in Ukraine on February 23 when parliament appointed a pro-Western interim leader after impeaching a defiant president Viktor Yanukovych, whose whereabouts remain a mystery following a week of carnage. AFP PHOTO/ SERGEI SUPINSKY

Acting head of Ukraine's Security Service, Valentin Nalivaichenko speaks during a session at the Parliament in Kiev on February 23, 2014. A new era dawned in Ukraine on February 23 when parliament appointed a pro-Western interim leader after impeaching a defiant president Viktor Yanukovych, whose whereabouts remain a mystery following a week of carnage. AFP PHOTO/ SERGEI SUPINSKY

Acting head of Ukraine's Security Service, Valentin Nalivaichenko speaks during a session at the Parliament in Kiev on February 23, 2014. A new era dawned in Ukraine on February 23 when parliament appointed a pro-Western interim leader after impeaching a defiant president Viktor Yanukovych, whose whereabouts remain a mystery following a week of carnage. AFP PHOTO/ SERGEI SUPINSKY

Valentin Nalivaychenko, head of the Ukrainian Secret Service, speaks during a session of the parliament in Kiev on February 22, 2014. Ukraine's parliament on February 22 voted to hold early presidential elections on May 25, passing a resolution stating that Viktor Yanukovych had failed to properly fulfil his duties as president. The resolution said that Yanukovych "is removing himself (from power) because he is not fulfilling his obligations, and (that parliament) is setting elections for May 25." AFP PHOTO/ YURY KIRNICHNY

Valentin Nalivaychenko, head of the Ukrainian Secret Service, speaks during a session of the parliament in Kiev on February 22, 2014. Ukraine's parliament on February 22 voted to hold early presidential elections on May 25, passing a resolution stating that Viktor Yanukovych had failed to properly fulfil his duties as president. The resolution said that Yanukovych "is removing himself (from power) because he is not fulfilling his obligations, and (that parliament) is setting elections for May 25." AFP PHOTO/ YURY KIRNICHNY