Dozens of travelers from Maine were walking toward the Louvre's Apollo Gallery when suddenly, their tour group was forcefully pushed back.

The brazen robbery on Sunday has put a spotlight on security protocols in the sprawling museum, which have been tested over the years by break-ins and thefts.

Authorities were racing Monday to reassure the public about security at key cultural sites — and find the jewels stolen from the museum before they can be broken up and melted down.

About 100 investigators are now involved in the police hunt for the gems and heist suspects​, said prosecutor Laure Beccuau, whose office is leading the investigation.

The Louvre posted on X that it was closed for the day "for exceptional reasons." It has remained closed to the public since. The Los Angeles County Sheriff's Department is investigating the fatal shooting of a man who allegedly groped and attacked Compton customers and employees.

If you've been captivated by the real-life heist of the Louvre, this Netflix show features an even more sophisticated Louvre heist in its first episode.

The thieves who stole priceless jewelry from the Louvre are reviving memories of an audacious gang that stole $500 million in valuables in a series of daring heists that took place over nearly two decades.

The Louvre remained closed Monday, a day after historic jewels were stolen from the world’s most-visited museum in a daring daylight heist that prompted authorities to reassess security measures at cultural sites across France.