As the alarms sounded at the Louvre Museum on Sunday morning, four suspects took off on two motorbikes, winding their way through central Paris, allegedly carrying with them a haul of "priceless" jewelry once worn by queens and made of sapphire, diamonds and emeralds.

They haven't yet been found.

About 24 hours after the brazen theft of some of the most recognizable pieces of glittering French heritage, which were taken during daylight hours from the world's most-visited museum, a manhunt and investigation are in full swing, according to state and law enforcement officials.

"The theft committed at the Louvre is an attack on a heritage that we cherish because it is our history," President Emmanuel Macron said on social media on Sunday.

He and other French officials vowed that the pieces

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