Russia attacked two Ukrainian ports on Friday, damaging three Turkish-owned vessels including a ship carrying food supplies, Ukrainian officials and one ship owner said, days after Moscow threatened to cut "Ukraine off from the sea".

Moscow pounded Ukrainian power infrastructure with drone and missile strikes on Saturday and Kyiv launched a deadly strike of its own on southwestern Russia, a day before talks involving senior European and U.S. officials aimed at ending the war were set to resume.

Choice to send Steve Witkoff highlights Washington's growing urgency to bridge remaining gaps with Kyiv over plan's terms