Police investigating the robbery of Kim Kardashian West say they believe the jewellery thieves "to be rather old and of European origin," and may have links to organised crime networks.
The US reality TV star was robbed to the tune of €10m in the early hours of Monday morning after five men who were disguised as police officers burst into her exclusive hotel suite and tied her up.
The jewellery thieves "appeared to be rather old and of European origin," a source close to the inquiry told 'Le Parisien'.
"It could be old-timers (from the criminal underworld) who got wind of a good tip," the source is cited as saying. The same person said that the criminals would have a hard time selling the jewels.
"It will be very, very hard to flog the diamond from Kim Kardashian's wedding ring," they said. "Even if it is recut, nobody will want to run the risk of reselling it. Or otherwise the thieves will have to sell it on the cheap."
It comes as police said they believed the robbers must have known that Ms Kardashian West was alone.
Her bodyguard, Pascal Duvier, had been escorting the star's sisters to a Parisian nightclub when the robbers struck. Mr Duvier has already been questioned by police and is not suspected of having any links to the robbery.
A source close to the inquiry also said that there was "no indication that she had been lent" any of the stolen jewels - in other words, they believe that she owned them all.
There is fervent speculation as to who might be behind the robbery, with the infamous Pink Panther gang among the prime suspects.
Telegraph Media Group Limited 
French authorities investigating the €9m burglary in Kim Kardashian's residence are trying to determine how burglars gained access to the exclusive property where she was staying.