Ukraine's President is calling for worldwide demonstrations to mark exactly a month since Russia launched its invasion.
Hundreds of civilians have been killed and more than three million Ukrainians have fled their country since the war started.
Addressing his nation in English for the first time, President Zelenskyy says everyone can show their solidarity:
Meanwhile Russian forces are continuing to bombard the port city of Mariupol - where residents have run out of food and water.
Around 90 per cent of the city's buildings have been damaged or destroyed.