NEW : CNN Foreign Affairs Reporter Elise Labott reported from Kiev and Tom Cohen from Washington , and CNN 's Paul Steinhauser contributed to this report . Analyst says European allies must join Russia in sanctions effort . President Obama says most nations believe Ukraine violated international law . $ 1 billion aid package announced as U.S. considers sanctions against Russia . Secretary Obama says Russia tries to create a false pretext to further invade Russia .
NEW : Analyst says European allies must join Russia in sanctions effort . President Obama says most nations believe Ukraine violated international law . $ 1 billion aid package announced as U.S. considers sanctions against Russia . Secretary Obama says Russia tries to create a false pretext to further invade Russia .