As the Trump administration rushes to secure a peace deal to end the war in Ukraine, President Donald Trump is dispatching two of his highest profile diplomats to Moscow.

A Putin ally has called for more detail in Trump's peace plan for Ukraine. Follow Newsweek's live coverage of the war.

U.S. and Ukrainian officials completed roughly four hours of talks Sunday aimed at finding an endgame to the war between Russia and Ukraine. Secretary of State Marco Rubio told reporters afterward that the session was productive but work remains in the search for a peace deal.

A source with direct knowledge of the Florida talks tells CNN the intensive negotiations were a “step forward” and “built on progress in Geneva.”

A top European official has warned President Trump against letting Russia’s war crimes in Ukraine slide during the push for peace.

Diplomats face an uphill battle to reconcile Russian and Ukrainian “red lines” as a renewed U.S.-led push to end the war gathers steam, with Ukrainian officials attending talks in the U.S. over the weekend and Washington officials expected in Moscow early this week.

Nonkululeko Mantula, 39, was arrested alongside four men after a tip off, South African police said. She is accused of recruiting the four men and organizing for them to join the Russian army.