At an emergency meeting of the U.N. Security Council on Friday, the United States warned Russia to move toward peace and meet with Ukraine or face possible sanctions.

Ukrainian President Volodymyr Zelenskyy said Friday that Ukrainian officials want to meet with U.S. President Donald Trump and European leaders next week to discuss recent developments in efforts to end the three-year war with Russia.

But Ukrainian military spokesperson Viktor Trehubov said Kyiv's forces had scored front-line successes, keeping Russian troops from seizing targets in Donetsk region and halting further advances into Dnipropetrovsk region. In one area, he said, Kyiv's troops had surrounded Russian units.

President Donald Trump again on Monday expressed frustration with Russian counterpart Vladimir Putin as Russian strikes on Ukraine continued.