US President Barack Obama has ordered sanctions on individuals and entities responsible for undermining democratic institutions in Ukraine, the White House said.
The US State Department is putting together visa bans on some individuals involved in threatening territorial integrity of Ukraine.
The visa bans apply to both Russian and Ukrainian officials and other individuals, a senior US official said.
Barack Obama warned Russia that the West will be forced to apply a cost to Moscow if it fails to change course in its dispute with Ukraine.
The ballot paper that the people of Crimea will use in Sunday's referendum was published today
Vitali Klitschko's visit to the eastern city of Donetsk is clearly an attempt to try to ease the divisions with Ukraine.