Somali militants say French intelligence officer Denis Allex has been executed. In a Tweet, Al Shabbab said Allex had been killed on Wednesday.
A French rescue bid failed last week. French officials said Allex had died in the rescue effort but the rebel group claimed he had survived.
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The cyclist said the victory was as sweet as his first win as he became the first Briton to win the race three times.
Local police confirmed the explosion, which occurred near Nuremberg.
Temperatures slide a couple of degrees