PARIS (AP) — In a minutes-long strike Sunday inside the world’s most-visited museum, thieves rode a basket lift up the Louvre ‘s facade, forced a window, smashed display cases and fled with priceless Napoleonic jewels, officials said.

The daylight heist about 30 minutes after opening, with visitors already inside, was among the highest-profile museum thefts in living memory and comes as staff complained that crowding and thin staffing are straining security.

The theft unfolded just 250 meters from the Mona Lisa, in what Culture Minister Rachida Dati described as a professional “four-minute operation.”

One object, the emerald-set imperial crown of Napoleon III’s wife, Empress Eugénie, containing more than 1,300 diamonds, was later found outside the museum, French authorities said. It was reportedly recovered broken.

Images from the scene showed confused tourists being steered out of the glass pyramid and adjoining courtyards as officers closed nearby streets along the Seine. No one was hurt.

Also visible was a lift braced to the Seine-facing facade near a construction zone, since removed — the thieves’ entry point and, observers said, a striking vulnerability for a palace museum.

A museum already under strain

Around 9:30 a.m., several intruders forced a window, cut panes with a disc cutter and went straight for the glass display cases, officials said. Interior Minister Laurent Nunez said the crew entered from outside using a basket lift via the riverfront facade, where construction is underway, to reach the hall with the 23-item royal collection.

Their target was the gilded Apollon Gallery — where the Crown Diamonds are displayed, including the Regent, the Sancy and the Hortensia.

The thieves smashed two display cases and fled on motorbikes, Nunez said. Alarms brought Louvre agents to the room, forcing the intruders to bolt, but the theft was already done.

Eight objects were taken, according to officials: a sapphire diadem, necklace and single earring from a matching set linked to 19th-century French queens Marie-Amélie and Hortense; an emerald necklace and earrings from the matching set of Empress Marie-Louise, Napoleon Bonaparte’s second wife; a reliquary brooch; Empress Eugénie’s diadem; and her large corsage-bow brooch — a prized 19th-century imperial ensemble.

“It’s a major robbery,” Nunez said, noting that security measures at the Louvre had been strengthened in recent years and would be reinforced further as part of the museum’s upcoming overhaul plan. Officials said security upgrades include new-generation cameras, perimeter detection, and a new security control room. But critics say the measures come far too late.

The Louvre closed for the rest of Sunday for the forensic investigation to begin as police sealed gates, cleared courtyards and shut nearby streets along the Seine.

Daylight robberies during public hours are rare. Pulling one off inside the Louvre with visitors present ranks among Europe’s most audacious in recent history, and at least since Dresden’s Green Vault museum in 2019.

It also collides with a deeper tension the Louvre has struggled to resolve: swelling crowds and stretched staff. The museum delayed opening during a June staff walkout over overcrowding and chronic understaffing. Unions say mass tourism leaves too few eyes on too many rooms and creates pressure points where construction zones, freight routes and visitor flows meet.