ITV News' Europe Editor James Mates reports that the alleged marching of prisoners-of-war through Donetsk is a violation of two articles of the Geneva Convention.
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The Olympian was one of several sports stars who opened up to the prince during an event for his mental health charity Heads Together.
There will be sunny spells, with temperatures peaking at 23 Celsius (73F). However, Northern Ireland will experience frequent showers.
Scottish X-Men star Alan Cumming under fire for 'offensive' comments blaming Brexit vote on 'stupid English people'.