As Ukraine prepares for presidential elections on Sunday, a social media struggle is underway in the country's eastern provinces.
That's where pro-Russian separatists have seized government buildings in many towns and declared independence after a much-disputed referendum. The separatists have vowed to block the vote in at least two key regions, Donetsk and Luhansk.
Separatists have seized voting commission offices, confiscated voter rolls and intimidated local election workers, government officials say.