Flood levels in the eastern German city of Dresden were expected to rise further today as the Elbe river flooded large parts of the old town.
Some 1,000 people have been evacuated from their homes so far and the city issued a level four flood warning - the highest on the scale.
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The talks descended into crisis on Friday when Canada's trade minister Chrystia Freeland walked out of meetings.
Police in New York are still investigating what the substance is and whether it could be harmful.
The Sherlock actor made the comment while he received an award for his humanitarian work.