European Union leaders will threaten Russia with new sanctions over Ukraine on Saturday but, fearful of a new Cold War and self-inflicted harm to their own economies, should give Moscow another chance to make peace.

• August 30, 2014

Poland and Ukraine refused permission for a plane carrying Russian Defense Minister Sergei Shoigu to use their airspace on Friday while returning home from a visit to Slovakia.

• August 29, 2014

The International Monetary Fund signed off on its first review of Ukraine's $17 billion loan program on Friday, but warned risks loomed ahead as long as Kiev continued to fight a pro-Russian separatist rebellion in the east.

• August 29, 2014

Ukraine called on Friday for full membership in NATO, its strongest plea yet for Western military help, after accusing Russia of sending in armored columns that have driven back its forces on behalf of pro-Moscow rebels.

• August 29, 2014

French President Francois Hollande said on Thursday it would be "intolerable and unacceptable" if it were proven that Russian troops had entered Ukrainian territory, warning that a further escalation would lead to more sanctions.

• August 28, 2014

Ukraine accused Russia of launching a new military incursion across its eastern border on Wednesday, as hopes quickly faded that Tuesday's talks between their two presidents might mark a turning point in a five-month-old crisis.

• August 27, 2014

Ukraine warned Europe on Wednesday that Russia could cut off gas to the continent this winter, but Moscow responded that the supply of gas would continue regardless of politics.

• August 27, 2014

Western sanctions over the Ukraine crisis could force some executives at Russian firms with foreign passports to give up certain duties, complicating life at the top of some of the country's largest companies.

• August 27, 2014