A thief or crew of thieves recently carried out one of the largest art heists in California history,breaking into a storage facility for the Oakland Museum of California under the cover of darkness and making off with more than 1,000 precious artifacts.

Oakland police said the burglary took place just before 3:30 a.m.on Oct. 15, which is four days before robbers stole a trove of priceless Napoleonic jewels from the the Louvre Museum in Paris.

items stolen from the Oakland museum included Native American baskets, jewelry, laptops, daguerreotype photographs and intricate beadwork.

Oakland Museum of California Hit by Burglary at Off-Site Storage Facility

A burglary has occurred at an off-site storage facility belonging to the Oakland Museum of California, resulting in the theft of valuable artifacts.Details surrounding the incident are still emerging, but authorities are investigating the possibility of inside involvement.

the Oakland Police Department confirmed the break-in, but has not yet released a comprehensive list of the stolen items or their estimated value. Museum officials are cooperating fully with the investigation, according to a statement released Tuesday.

Retired Los Angeles Police Capt. John Romero, who led the department’s commercial crimes unit, said that if the break-in was completed without setting off alarms or alerting security, it’s possible that the person or people behind it had some internal knowledge. The fact that the heist took place at an off-site storage unit suggests the thieves knew where the museum kept items away from its primary location.