A comedian tipped to become Ukraine's next president and his incumbent rival go head-to-head in an extraordinary stadium debate Friday, as campaigning reaches its climax before a weekend vote.

Comedian Volodymyr Zelensky and Ukrainian leader Petro Poroshenko on Wednesday finally agreed to a debate to close a presidential campaign that has at times descended into farce.

Ukraine's police said Sunday that 25 officers were injured in clashes with ultra-nationalists who tried to attack a presidential motorcade ahead of elections at the end of this month. Nineteen police officers were hospitalised in the city of Cherkasy, where supporters of the far-right National Corps party tried to block President Petro Poroshenko's motorcade and…

Ukrainian President Petro Poroshenko on Tuesday launched an uphill battle for re-election, five years on from a bloody uprising that brought him to power on a promise to tackle corruption.

Ukrainian President Petro Poroshenko on Wednesday announced the end of a martial law in the country's border regions, which was introduced last month after Russia's seizure of three of Kiev's navy vessels in the Sea of Azov. "Today, right now, at 2:00 pm (1200 GMT) the martial law ends. This is my principal decision," Poroshenko…

Russian President Vladimir Putin said Saturday he briefed his US counterpart Donald Trump on the Ukraine crisis as he came under pressure over Moscow's robust foreign policy at the G20 summit in Argentina.

US President Donald Trump headed to Argentina Thursday for a fractious weekend of G20 summitry, cancelling planned talks with Russia's leader...

Ukraine's president signed an act imposing martial law in border regions on Wednesday as mounting tensions over Russia's seizure of Ukrainian ships saw US President Donald Trump threaten to cancel talks with Vladimir Putin.

NATO will hold an emergency meeting with Ukrainian officials at alliance headquarters in Brussels on Monday over the naval standoff with Russia off the coast of Crimea.

Ukrainian President Petro Poroshenko on Saturday condemned the influential Russian Orthodox Church, which counts millions of believers, as a threat to national security.

Ukraine on Friday charged a prisoner swap negotiator with plotting to assassinate President Petro Poroshenko and other top officials leading the four-year campaign against Russian-backed eastern insurgents.

"Above all, this decision is very, very saddening," Erdogan said in his first reaction to the decision, at a news conference with Ukrainian counterpart Petro Poroshenko in Kiev.