Ukraine President Petro Poroshenko told British Prime Minister David Cameron that Ukrainian forces have destroyed part of Russian military equipment after it crossed the border into Ukraine during the night, according to the president's website.
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Four migrants who tried to cross the Channel in an inflatable dinghy have reportedly been rescued by French coastguards.
The victim, a man in his 40s, is being treated in hospital for "life-changing" injuries after the attack by two men who remain on the run.
Heavy security presence as 64,000 fans gather at the Stade de France stadium for the Six Nations rugby match between France and Italy.