U.S. President Donald Trump said he was "not done" with Russian President Vladimir Putin, according to a BBC interview published on Tuesday, hours after he said he was disappointed in Putin and threatened Moscow with sanctions.

Kyiv's mayor is among those asking why there has to be a delay to introducing new tariffs as the fighting continues.

Former Secretary of State Condoleezza Rice weighed in earlier this week on President Trump’s ultimatum on Russia, suggesting it is a “turning point” in peace efforts in the over three-year-long war in Ukraine.