US Secretary of State John Kerry has heavily criticised Russia for failing to act in accordance with agreements made in Geneva last week.
In a statement, Mr Kerry said Russia was backing "an illegitimate course of armed violence" and supporting destabilising forces in the east of Ukraine.
"One week later, it is clear that only one side, one country is keeping its word," Mr Kerry said.
"The Geneva Agreement is not open to interpretation. It is not vague. It is not subjective. It is not optional."
European Union foreign ministers added 13 people to their visa ban and asset freeze list over Ukraine's crisis.
Well that’s the voting over, and no surprises so far. A ‘Yes’ vote claimed to be 89% in Donetsk, and suddenly Ukraine is no more.
Nearly 90 percent of voters in eastern Ukrainian region voted for self-rule, the head of the separatist election commission said.