The U.K. government warned Tuesday that Russian President Vladimir Putin and his commanders in Ukraine could face prosecution for war crimes, comparing the "sickening" onslaught to the darkest days of the Yugoslav conflicts.

Prime Minister Boris Johnson said Russia's bombardment of Ukraine's second city Kharkiv was "absolutely sickening" and

The United States imposed sanctions on the ultra-wealthy Russian oligarchs at the heart of President Vladimir Putin's regime Thursday in the latest ratcheting up of pressure on the Kremlin to halt its invasion of Ukraine.

They and their family members "will be cut off from the U.S. financial system, their assets in the United States will be frozen

"Putin go to hell. And take Orban with you!" shouted an angry protester at a demonstration in Budapest this week. 

The protesters were gathered near a Russia-linked investment bank that critics of Hungarian Prime Minister Viktor Orban call a "Kremlin spy bank."

Rallied by opposition leader Peter Marki-Zay, they chanted "Russians go home!," a slogan