The United States have imposed visa restrictions for Russians and Crimeans as they threated sovreignity and territorial integrity of Ukraine.

"Pursuant to the President’s guidance, today the State Department is putting in place visa restrictions on a number of officials and individuals, reflecting a policy decision to deny visas to those responsible for or complicit in threatening the sovereignty and territorial integrity of Ukraine.  This new step stands in addition to the policy already implemented to deny visas to those involved in human rights abuses related to political oppression in Ukraine," the statement reads.

President Barack Obama signed an Executive Order that authorizes sanctions on individuals and entities responsible for activities undermining democratic processes or institutions in Ukraine.