The top floor of Paris' Ritz Carlton hotel, under renovation for three years, has caught fire.

The fire began early Tuesday at the posh hotel where Princess Diana spent her final hours before the car crash that took her life. Paris police say there are no known victims. Fire trucks and police blocked of the Place Vendome at the height of the morning rush, and firefighters on cranes sprayed the blaze to try to bring it under control.

Place Vendome is also home to numerous high-end jewelry stores and boutiques, as well as France's Justice Ministry.