Ukraine plans to open nine "humanitarian corridors" on Tuesday to evacuate civilians from areas besieged by Russian forces, and will attempt to deliver humanitarian supplies to encircled Mariupol, Deputy Prime Minister Iryna Vereshchuk said.

Vitaliy Koval, governor of the northern region of Rivne, said separately that the death toll from an airstrike on a television tower in his region on Monday has risen to at least 19.