US Secretary of State John Kerry squarely blamed Russian agents on Tuesday for separatist unrest in eastern Ukraine, saying Moscow could be trying to lay the groundwork for military action like in Crimea.
"It is clear that Russian special forces and agents have been the catalyst behind the chaos of the last 24 hours," Kerry told lawmakers, adding this "could potentially be a contrived pretext for military intervention just as we saw in Crimea."
Ukraine's curiously named Internet Party has come up with an offbeat campaign gimmick to lure voters - dressing as Star Wars characters.
Tensions remain high in eastern Ukraine after at least three died in a day of shooting during what was supposed to be an Easter truce.
In an exclusive interview with NBC News, the Ukrainian Prime Minister warns of the dangers of unchecked Russian expansion and aggression.