Burglars who broke into the Louvre museum in Paris on Sunday initially failed to open the display cases with angle grinders, the Le Parisien newspaper reported on Thursday, citing museum surveillance footage.

No security cameras were monitoring the second-floor balcony where thieves gained access to the Louvre to steal historic jewels worth over $100 million, the museum’s director told a French Senate committee hearing.

Commodity thieves generally don’t worry about leaving some valuable pieces behind. The Louvre robbers tried to steal a crown that had belonged to Empress Eugénie, featuring eight gold eagles, 1,354 diamonds, 1,136 rose-cut diamonds and 56 emeralds. But they abandoned it in their haste to leave.

Thieves made off with about 2,000 gold and silver coins from a French museum — just hours after the audacious $1 million raid at the Louvre.

Thieves carjacked the furniture lift used to break into the Louvre for the smash-and-grab raid nine days before the crown jewel heist.

Meanwhile, the Louvre’s director, Laurence des Cars, is set to make a much-anticipated appearance in front of France’s Senate Culture Committee to answer questions regarding the museum's security and what went wrong on Sunday when nine pieces were swiped from the museum’s Apollo Gallery.