Scores of armed pro-Russian separatists massed outside the walled home of Ukraine's richest man, Rinat Akhmetov, in the eastern city of Donetsk on Sunday as Ukrainians voted for a new president. The rebels, roundly denounced by Akhmetov, have prevented voting in Donetsk, an industrial hub of a million people, and other parts of mainly Russian-speaking eastern Ukraine, where they have declared "people's republics" outside Kiev's control. Coal and steel billionaire Akhmetov, known abroad as the owner of Shakhtar Donetsk soccer club, has urged people to vote and accused the rebels of "genocide" last week.