Five paintings by Picasso, Matisse and other great artists have been stolen from the Museum of Modern Art in Paris, French officials say.
The paintings are estimated to be worth just under 100m euros (£86m; $123m).
They were taken overnight on Wednesday and reported missing early on Thursday, officials say.
The museum, across the River Seine from the Eiffel Tower, has been cordoned off by investigators.
Security camera footage reportedly shows someone entering the museum through a window during the night.