The war between Russia and Ukraine has become a major geopolitical crisis of the 21st century.

Moscow and Beijing lash out at Washington's new anti-Russian sanctions that also target China for the first time, warning the United States could face consequences.

US sanctions against Russia tied to a nerve agent attack in Britain, which were announced earlier this month, will officially take effect on Monday, according to a notice posted at the Federal Register.

President Donald Trump grudgingly accepted new congressional sanctions on Russia, the top U.S. diplomat said on Tuesday, remarks in contrast with those of Vice President Mike Pence, who said the bill showed Trump and Congress speaking "with a unified voice."

The US Senate votes nearly unanimously for legislation to impose new sanctions on Russia and force President Donald Trump to get Congress' approval before easing any existing sanctions on Russia.