In what would be the second high-profile jewerly heist of the Cannes Film Festival, a diamond necklace valued at $2.6M is said to be missing after a star-studded party at the Hotel Du Cap earlier this week. Fawaz Gruosi, founder of Swiss jeweler De Grisogono, told Reuters that the necklace disappeared after being worn as part of an annual event, which this year celebrated the company’s 20th anniversary and was attended by Sharon Stone and Paris Hilton among others. Local police, hotel security and 80 bodyguards had been on duty Gruosi told Reuters, but an inventory at the end of the night found the necklace missing. A Cannes police source said they were investigating whether it was a theft, an inventory issue, or a loss, according to Reuters. Last week’s theft of $1.4M in Chopard jewels is still under investigation. Swiss newspaper Le Matin says police are actively pursuing at least three suspects.