More than 60 people are now feared dead after a Russian bomb hit a school in eastern Ukraine on Saturday, the local governor says.

Some 90 local residents had been sheltering in the school in the village of Bilohorivka, near the frontline in the Donbas region.

Diplomatic efforts are continuing to try to rescue wounded soldiers from the besieged Azovstal steelworks in Mariupol.

All remaining women, children, and elderly were evacuated from the steelworks on Saturday.

Russia has besieged the plant for weeks, demanding the surrender of its defenders from the Azov battalion.

Ukraine's president Volodymyr Zelenskyy is set to hold talks with G7 leaders - including US President Joe Biden and the UK's Boris Johnson - via video conference.

EU ambassadors will also meet in Brussels on Sunday to discuss the sixth round of economic sanctions against Moscow.

Ukraine is continuing a counter-offensive near the city of Kharkiv, and says it has recaptured five villages.