Ukraine's Petro Poroshenko, set to be the new president after today's election, said he would never recognise Russia's "occupation of Crimea" and ruled out negotiating with separatists.
Asked about relations with Russia, he said the "sovereignty and territorial integrity" of Ukraine were paramount for him.
The confectionery tycoon also ruled out negotiations with pro-Russian separatists in the east of the country until they put down their weapons.
More top news
Two cranes have collapsed during a bridge building operation onto housing in Holland, seriously injuring at least 20 people, reports say.
About 130,000 litres of fake vodka have been seized from an illegal booze factory, the tax office said.
Groups of dairy farmers have milked supermarket shelves dry across the country in a protest against falling prices.