US Vice President Joe Biden is set to announce a package of assistance to Ukraine focused on the economy and the energy sector.
Mr Biden has arrived in Kiev for a two-day visit, where he will set out plans to help the Ukrainian government better exploit the country's natural gas resources, along with measures to ensure international aid money is spent efficiently.
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.
Russia, the US and the EU say that all sides have agreed to steps to "de-escalate" the crisis in Ukraine at talks in Geneva.