A 30-year-old Briton has died after crashing in the cycling section of the Nice Ironman event on the French Riviera on Sunday, emergency services said.

The man went off the road on a corner and crashed into a wall in Tourrettes-sur-Loup in the countryside inland from Nice, they said. A helicopter was sent to take him to hospital but he died of his injuries.

Ironman competitions are an extreme form of the triathlon. The event in Nice involved a 3.8km swim, a 180km cycle and a running marathon (42km).

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