U.S. Secretary of State Marco Rubio said Tuesday Washington remained ready to mediate in the war between Russia and Ukraine, after Moscow threatened new strikes on Kiev.

Russian Foreign Minister Sergey Lavrov warned U.S. counterpart Marco Rubio on Sunday strikes on the Ukrainian capital Kyiv will continue.

Russian Foreign Minister Lavrov warned Rubio to evacuate US diplomats from Kyiv, citing planned strikes on military facilities and decision-making centers.