Violent fascist radicals from the Right Sector are arriving in Ukranian areas with Russian affiliated populations likely to enforce their point of view. The sympathetic to them NYT account:

    With the city in play, street fighters from Independence Square in Kiev have arrived by bus in Odessa. Their eyes deep from the violence they had just seen, attired in body armor, they draw apprehensive stares, but their presence has also allowed supporters of the interim government to feel safe enough to stage several large rallies.

...A few days ago the coup government in Kiev had called for a mobilization of the military reserve. That failed. Obviously no one showed up. The coup government has now called to form a "National Guard" of volunteers. With all security and defense related top-jobs now in the hand of the fascists one can easily imagine who will be allowed to join. All Right Sector members have already gone through some (para-)military training as it is a condition for membership. They will revive memories about the 14th SS-Volunteer Division "Galician" which often used in anti-partisan action, i.e. to suppress local dissent:
...The U.S. puppets in Kiev called for military intervention by the "west":

    Parliament passed a resolution calling on the United States and Britain, co-signatories with Russia of that treaty to "fulfill their obligations ... and take all possible diplomatic, political, economic and military measures urgently to end the aggression and preserve the independence, sovereignty and existing borders of Ukraine".

I do not yet believe that anyone is the "west" is willing to follow up on such an invitation.