Hundreds of Ukrainian orphans have left for Poland after escaping the fighting in the south of the country.

Meanwhile, a second attempt to free civilians from the besieged city of Mariopol has failed, with the local council there saying Russian shelling has made it impossible for people to leave the city.

The number of refugees who have left Ukraine has now reached 1.5 million, according to the United Nations.

A look at the main developments from the day.

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