The suspects, said to be mainly in their fifties and known to police, were detained in co-ordinated raids in the Paris region and elsewhere.

Kardashian was held at gunpoint by men dressed as police officers who later escaped with an estimated €10m (£8.7m; $10.5m) in jewellery.

A diamond cross pendant was found the next day in a nearby street, apparently dropped by the gang as they made their getaway by bicycle and on foot.

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