Waves of Russian drones and missiles struck districts across the Ukrainian capital Kyiv early on Tuesday, damaging an apartment building, sparking fires and injuring up to 16 people, city officials said.

Families in Ukrainian cities are taking refuge from massive swarms of Russian drones, as Moscow steps up its airborne assault with attacks designed to undermine Ukrainian morale.

The Kremlin said Russia was still ready to mediate between Iran and Israel, and its offer remained on the table to remove highly enriched uranium from Iran and convert it into civilian reactor fuel as a possible way to defuse the crisis over Tehran's nuclear programme.

When Israel first started bombing Iran, many in Russia saw it as an opportunity, a means of drawing support and attention away from Ukraine.

Ukraine and Russia have completed an exchange of dead bodies - the final stage of a deal to bring home fallen soldiers. Kyiv said Moscow handed over 1,245 bodies on Monday, bringing the total to 6,057 in the past few days. It said it was now verifying whether all the bodies were indeed of Ukrainian soldiers.

Ukraine received another 1,245 bodies of its soldiers killed in the war with Russia on Monday in the final stage of the repatriation of remains agreed at talks in Istanbul, Ukrainian officials said. "Today marks the final stage of the repatriation of fallen soldiers,