U.S. says Russian action in Ukraine endangers 'global order'

WASHINGTON (Reuters) - The United States warned Russia on Friday that its continued support of separatists fighting in Ukraine despite a cease-fire agreement was a direct threat to the "modern global order" and could bring additional costs.

It was the strongest U.S. warning to Russia since the violation of a European-brokered truce last Sunday and followed calls from the U.S. Congress for new sanctions on Moscow and to provide weapons to Kiev.