MOSCOW/KIEV, July 17 (Xinhua) -- Russia on Tuesday rejected U.S. President Donald Trump's 50-day ultimatum to agree to a Ukraine ceasefire, dismissing the threat of "severe tariffs" as unacceptable.

WASHINGTON, July 14 (Xinhua) -- U.S. President Donald Trump said Monday that the United States will send weapons to Ukraine through NATO, and threatened "severe tariffs" targeting Russia if a ...