A chauffeur and two other men have been released by French investigators probing a robbery at Kim Kardashian's Paris apartment in which 10 million US dollars worth of jewellery was stolen.
The driver's brother and 13 other people remained in custody on Wednesday after a round of arrests this week, according to the Paris prosecutor's office.
Authorities are focusing on the possibility that the robbery at the rented property last October was an inside job.
Officials have said that brothers Michael Madar, 40, and Gary Madar, 27, worked for the same car service company and were among those arrested. It was unclear which brother was driving Kardashian on the night of the robbery.
An investigating judge may travel to the United States to speak to the star.
The jewels have not been recovered.
In neighbouring Belgium, the Antwerp prosecutor's office would not comment on reports that the stolen goods might have been smuggled to Antwerp, a major jewel trading centre.
Thieves are believed to have forced their way into the private apartment where Ms Kardashian West was staying during Paris Fashion Week, tied her up and stole the jewellery.
Ms Kardashian West has not commented publicly since Monday's arrests.