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The fate of more than 260 soldiers taken to Russian controlled territory on Monday remains unclear. Ukraine suggests a prisoner exchange but Moscow has not confirmed this. Also: a study into the behaviour of mosquitos could change the way malaria is tackled across Africa, and Nasa's rover begins work to find life on Mars.

Many have been admitted to hospital in the Russian controlled town of Novoazovsk. Also: Sri Lanka's new prime minister warns of further difficult months, a huge dust storm hits the Middle East, and how robot-assisted surgery might speed up recovery times.

The authorities in Bucha accuse Russian soldiers of war crimes. Also: North Korea's leader orders his military to help respond to the Covid outbreak; and we report on how some people in the food-producing giant Brazil are struggling to get enough to eat.

They want to join the alliance after Russia’s Ukraine invasion. Also, killing of 10 people in US supermarket shooting a “hate crime”, and Tonga’s volcano explosion was biggest in a century.

The G7 says it will not acknowledge land seized by Russian military action. Also: thousands of pro-life supporters march in the US, and India bans wheat exports with immediate effect.

Israeli police with riot-gear hit mourners saying they were pelted with stones, as crowds carried the coffin. Also: Russia to suspend electricity supply to Finland, and critics praise "thrilling" Top Gun movie sequel.