At 07:30 ET the United States Government banned all transactions with the Russian Central Bank except for a few minor exceptions for energy related sales. From Forex Live:
US issues sanctions against Russian central bank
The highlights from the article above:
-Americans barred from engaging in any transaction involving Russia’s central bank
-That applies to Russia’s national wealth fund or ministry of finance
The financial and propaganda war from the West is now on in full. The question now becomes this:
Does Putin up the ante and will European and American cities have utilities functioning normally during the next 72 hours?