Ukrainian authorities and Russian-backed separatist rebels on Wednesday conducted the biggest exchange of prisoners since the start of an armed conflict in the country's east and a sign of progress in the implementation of a 2015 peace deal

Ukraine on Wednesday deplored Russia's decision to withdraw its military observers from a joint group monitoring the truce in eastern Ukraine, saying it could fuel hostilities

The European Union has extended sanctions against Russia because of stalled peace process in Ukraine

NATO is giving Secretary-General Jens Stoltenberg two more years as head of the world's biggest military alliance

Secretary of State Rex Tillerson says Ukraine is the sole sticking point keeping the U.S. and Russia from forging a closer relationship

Secretary of State Rex Tillerson's tenuous future in the Trump administration is following him to Europe

The Trump administration intends to name a former U.S. ambassador to the Philippines and Bolivia to run its embassy in Cuba

The European Union's top diplomat says the United States stepping away from a landmark nuclear deal would be counterproductive and insisted other disputes with Tehran should be tackled otherwise

A Bulgarian government jet carrying Prime Minister Boiko Borisov to Saudi Arabia has been denied access to Iranian airspace, forcing him to fly over Iraq