2,000 gold and silver coins were stolen during a museum robbery

Around 2,000 gold and silver coins worth around €90,000 (£78,000; $104,000) were stolen in a raid at another French museum – just hours after the daring theft of some of France’s crown jewels at the Louvre in Paris.

The incident happened at a museum dedicated to French philosopher Denis Diderot in Landres, northeastern France, on Sunday evening.

When the Maison des Lumières (House of Enlightenment) opened on Tuesday, workers noticed a smashed display case and raised the alarm, officials said. The coins were selected with “great expertise”, local authorities said in a statement to French media.

It is the latest in a recent string of robberies of cultural institutions across France.

Also in September, thieves stole two Chinese porcelain plates and a vase worth a total of 6.55 million euros from the National Porcelain Museum in the central city of Limoges. The items are still missing and no arrests have been made.

“They are unsellable on the art market. The pieces are too easy to trace anyway because they are so well listed,” a ceramics expert told Le Parisien newspaper at the time.

The heist that made headlines around the world was the daring heist of €88 million worth of historic jewels from the Louvre Museum in Paris.

A gang disguised as workers used power tools and a mechanical ladder to gain access to the Apollo Gallery on the first floor of the world’s most visited museum shortly after it opened on Sunday.

The loot included a diamond and emerald necklace given by Emperor Napoleon to his wife, a tiara worn by Empress Eugenie, wife of Napoleon III, and several items formerly owned by Queen Marie-Amelie.

Art detective Arthur Brand told the BBC there could be “copycats” operating across the country and some gangs doing multiple “hits”.

The Louvre robbery – like other incidents – has raised concerns in France about lax security at the institutions that hold some of the world’s most valuable treasures.

Speaking publicly for the first time since the robbery, Louvre director Laurence de Carre told French senators on Wednesday that CCTV around the perimeter of the Louvre was weak and ‘aging’.

The only camera monitoring the outer wall of the Louvre, where the thieves broke in, was pointed away from the first-floor balcony that led to the gallery where the jewels were kept, she said.

“We have failed these jewels,” des Cars said, adding that no one is safe from “brutal criminals – not even the Louvre.”

A preliminary report found that one in three rooms at the Louvre lacked CCTV and that its wider alarm system had not gone off.

Justice Minister Gérald Darmanen said security protocols had “failed”, complaining that the thieves who managed to get a modified truck to the museum had left France with a “terrible image”.

In the case of the gold stolen from the French Museum of Natural History, the building’s alarm system and surveillance systems were disabled by a cyber attack, with the thieves apparently knowing about it, French media reported at the time.