British journalist Kieron Bryan, who was being held in Russia for his part in a Greenpeace protest, has been released.
Greenpeace's Arctic Sunrise Twitter feed posted a picture of the newly-released Mr Bryan with the words, "Now, there's a smile!"
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Thousands of gallons of waste, including rotting animal carcasses, are being dumped in the countryside, an investigation has found.
Rain in the north tonight, cloudy and humid in the south
In an exclusive interview with ITV News, 100 metre world champion Justin Gatlin also said that booing at the World Championships "did hurt".