Live updates: Russia invades Ukraine

What we're covering here

• Talks between Russian and Ukrainian delegations will take place Monday on the Ukrainian-Belarusian border, President Zelensky's office said as Russian President Putin ordered his country’s deterrence forces – including nuclear arms – be placed on high alert.
• The US continues to see Russian forces face “stiff resistance” and their momentum slow in Ukraine's northern part, while forces are having a “little bit more success” in the south, a US defense official says.
• The White House and several EU nations announced the expulsion of certain Russian banks from the SWIFT banking system Saturday evening.