Ukrainian opposition leader Arseniy Yatsenyuk, left, and EU foreign policy chief Catherine Ashton, center, and former Ukrainian Foreign Minister Vladimir Ogryzko, right, arrive to meet Pro-European Union activists gathered on the Independence Square in Kiev, Ukraine, Tuesday, Dec. 10, 2013. Some demonstrators arrested in the massive protests sweeping Ukraine's capital will be released, embattled President Viktor Yanukovych promised Tuesday, trying to defuse a political standoff that is threatening his leadership. (AP Photo/Andrew Kravchenko)