European leaders are desperately pushing a new peace bid for Ukraine as the country slipped towards what its interim president warned Monday was already a "war" in the face of spreading violence.
More than 30 people were killed in a "criminal" blaze in Ukraine's southern city of Odessa, as violence spread across the country during the bloodiest day since Kiev's Western-backed government took power.
Austrian authorities said Friday that Ukrainian oligarch Dmytro Firtash had been placed in "extradition custody", the first step towards a possible extradition to the United States.
Ukraine's new leaders will likely sign a long-awaited political accord with the European Union next week, interim Prime Minister Arseniy Yatsenyuk said Wednesday after talks at the White House.
Interpol said Friday it was considering a request from Ukraine's new government to issue an arrest warrant for ousted president Viktor Yanukovych.
Ukraine stood in danger of breaking apart Friday after Crimea's parliament unanimously voted to join Russia in a sharp escalation of the worst East-West security crisis since the Cold War.
The European Union on Thursday froze assets held in the 28-nation bloc by 18 Ukrainians accused of embezzlement, including ousted Moscow-backed president Viktor Yanukovych.
Clashes broke out in the flashpoint eastern Ukrainian city of Donetsk on Wednesday following rival demonstrations by thousands of pro- and anti-Russian protesters, leaving around 10 people injured.
Some 50 armed men on Friday seized the airport of Crimea's capital Simferopol, a day after pro-Russian gunmen took over government buildings in the city.
US Vice President Joe Biden promised Ukraine's pro-Western interim leaders "full" US support Thursday as they seek to head off Russian influence.
US Secretary of State John Kerry spoke passionately Wednesday about the "incredible yearning for modernity" sweeping across the world, warning that free elections do not necessarily usher in true democracy in many countries.
A new era dawned in Ukraine on Sunday as parliament appointed a pro-Western interim leader after ousted president Viktor Yanukovych fled Kiev to escape retribution for a week of deadly carnage.
Ukraine's embattled leader signed a deal Friday with the opposition in a bid to end the ex-Soviet country's worst crisis since independence after three days of carnage left nearly 100 protesters dead.
President Barack Obama held "constructive" talks Friday with Russian President Vladimir Putin as he pressed for swift implementation of a deal to end Ukraine's deadly crackdown on protesters.
Ukraine's embattled leader announced a "truce" with the opposition as he prepared for a grilling by visiting EU diplomats Thursday over clashes that killed 26 and left the government facing diplomatic isolation.
Riot police launched a fresh assault on protesters in central Kiev early Wednesday, escalating a bloody standoff that has already left at least 18 people dead in a dramatic turning point for Ukraine's three-month political crisis.
US Vice President Joe Biden intervened as a political crisis in Ukraine turned deadly Tuesday, calling President Viktor Yanukovych and saying government forces that stormed a protest camp should withdraw.
Ukraine's pro-EU opposition asked Angela Merkel for sanctions against embattled President Viktor Yanukovych and financial support during talks in Berlin.
Protesters arrested during months of anti-government unrest in Ukraine were granted amnesty on Monday after the opposition agreed to end their occupation of Kiev city hall and other public buildings.
An estimated 70,000 pro-Western Ukrainians thronged the heart of Kiev on Sunday vowing never to give up their drive to oust President Viktor Yanukovych over his alliance with old master Russia.