The US may impose sanctions against Russian President Vladimir Putin over the crisis in Ukraine, the State Department has said.
Spokeswoman Jen Psaki said the US was considering the move, but it would not be taken soon.
The US has imposed visa bans and assets freezes on several Russian officials and lawmakers deemed to have been involved in Russia's annexation of the Crimea region from Ukraine. The US has also targeted businessmen with ties to Putin.
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.