Catch up: What happened in Russia's invasion over the weekend

The human toll of the invasion of Ukraine mounted over the weekend as Russia upped its bombardment of civilian areas and infrastructure.

China asked Russia to delay Ukraine invasion until after Olympics, Western intel shows

US to impose sanctions on Putin after Ukraine invasion

• Analysis: Putin vs. the entire concept of international law • Analysis: As war breaks out in Europe, China blames the US • Eurovision: Russia not allowed to compete • Aeroflot ban: British Airways cancels flights

Sanctions: Biden calls Putin's actions 'beginning of a Russian invasion' as US unveils new sanctions

President Joe Biden described events now underway in Ukraine as "the beginning of a Russian invasion" as he unveiled new sanctions to punish Moscow on Tuesday.

Watch: Map shows what a potential Russian invasion looks like

CNN's Tom Foreman uses a map to break down some of the potential military strategies Russia may use to invade Ukraine. On Monday, Russian President Vladimir Putin ordered troops into separatist-held parts of eastern Ukraine in what the Kremlin called a "peacekeeping" mission, just hours after he signed decrees recognizing the independence of the Moscow-backed regions.