The incident took place in Paris
American reality TV star Kim Kardashian was robbed at gunpoint in Paris by two men posing as police officers.
Kadarshian was tied up in the bathroom as robbers stole jewellery and other items worth up to €6m (£5.2m).
A spokeswoman for the star, who is 35, said she was “badly shaken but physically unharmed”.
The robbery took place at about 02:30 local time (00:30 GMT), police said.
Kardashian’s husband, the rapper Kanye West, had to leave the stage at the Meadows Music and Arts Festival in New York when he heard the news.
He told fans: “I’m sorry, family emergency. I have to stop the show.”
“The loss amounts to several million euros, mostly jewellery. The total amount is still being evaluated,” police said.
TV host James Corden criticised those making light of the incident.
He tweeted: “People making jokes about Kim Kardashian tonight would do well to remember that she’s a mother, a daughter, a wife, a friend. Be nice or shut up.”