Kim Kardashian has been held up at gunpoint in a Paris hotel room by masked men dressed as police officers.
They reportedly stole jewellery worth several million dollars.
Her spokeswoman said the reality TV star "is badly shaken but physically unharmed" after her ordeal on Sunday night, but offered no other details.
A Paris police official confirmed there was a robbery involving Kim, and that an investigation was under way.
The spokeswoman had told CNN there were two armed masked men, although it was later reported that there were five.
Kim's husband Kanye West was performing at the Meadows Music and Arts Festival in New York at the time. He abruptly ended his set on Sunday night after telling his fans he had a family emergency.
"I'm sorry, family emergency I have to stop the show," Kanye told the audience.
Kim has been in Paris for fashion week. She attended the Givenchy show on Sunday evening.
She was also ambushed last week by a serial celebrity prankster who attempted to accost her as she was entering a restaurant.
Kim was also attacked outside a Paris fashion week show in 2014. She was not hurt in either incident.
Paris has been a special place for the couple, who spent the weekend there before marrying in Florence in May of 2014.
It's unclear if the couple's two children, three-year-old daughter North and 10-month-old son Saint, were with Kim in the hotel room.