The Louvre Museum in Paris has been temporarily closed following a robbery, France’s culture minister said Sunday morning.

Rachida Dati wrote on X that the robbery happened Sunday morning and that there were no reports of injuries. An investigation has been launched, she said.

The museum said that it will remain closed Sunday “for exceptional reasons.”

According to the French daily Le Parisien, the thieves accessed the building on the Seine docks, where work is taking place. They used a freight elevator to access directly the targeted room, in the Apollo gallery, according to the report.

After breaking windows, two hooded men entered, while a third remained stationed outside, according to the Parisien report. The thieves took nine pieces from the Napoleon and the Empress jewellery collection. The damage is still being assessed, it said.

The Regent, the largest diamond in the collection weighing more than 140 carats, was not stolen, according to the report.

The criminals fled on a scooter toward the A6 motorway, the newspaper said.

The Louvre is the world’s most visited museum and houses many famous artworks and other valuable items.