Ukraine's president has lashed out at a BBC report that asserted a secret $400,000 payment was made to U.S. President Donald Trump's longtime lawyer last year to set up talks between the two leaders.
Media reports say a Belarusian court has sentenced a Ukrainian reporter to more than eight years in prison after convicting him of espionage.
Ukraine's main security agency has warned of a potential Russian cyberattack ahead of this weekend's final match of the Champions League soccer tournament.
Activists have announced a global campaign to demand the release of Ukrainian filmmaker Oleh Sentsov, who opposed Moscow's 2014 annexation of Crimea and is now on hunger strike in a Russian prison.
Ukraine has showcased the firepower of the Javelin antitank missile systems given to it by the United States last month in a performance President Petro Poroshenko called "a dream come true."
Ukraine has accused 35 football clubs of involvement in a match-fixing operation that allegedly earned millions of dollars a year for the organizers.
The lower chamber of the Russian parliament, the State Duma, has approved in its third and final reading a bill that provides for countermeasures against the United States and other countries that imposed sanctions against Russia.
Monitoring officials say clashes between Ukrainian forces and separatist rebels in eastern Ukraine have escalated in recent days to some of the fiercest fighting of 2018.
The Kyiv-born aviator who fled the Bolshevik Revolution and created the helicopters that have served U.S. presidents from Eisenhower to Trump.
Russia's Federal Security Service (FSB) has accused Crimean Tatar activists of orchestrating and carrying out attacks with Kyiv's support, allegations described as "fantasy" by the Ukrainian Security Service.
Crimea's Russian-installed leaders have failed to live up to promises to free up public access to beaches.
Ukrainian President Petro Poroshenko has signed a decree recalling Kyiv's envoys from bodies of the Commonwealth of Independent States (CIS), a loose grouping of former Soviet republics that he said Ukraine no longer has any use for.