Investigators into the violent raid that saw millions of dollars worth of jewelry snatched from Kim Kardashian West are focusing their inquiries on the possibility the robbery was an “inside job” and have taken Kim’s chauffeur that night and his brother into custody, the Associated Press reports.

Three Paris officials, speaking on condition of anonymity, told the news service that the driver and his younger brother were among the 17 people taken into custody.

The brothers worked for the same company, two of the officials said.

The 17 suspects picked up by French cops ranged in age from 23 to 72, and included several known to investigators for prior robberies and other crimes, according to a police document seen by the AP.

The claim concurs with a report in Le Figaro saying the alleged robbers were a “mixed bunch,” which also said the oldest of the gang was 72 years old.

Earlier this month, the reality-TV personality broke her silence on the robbery in a teaser for the Kardashian family’s upcoming season, telling two of her sisters her thoughts at the time: “They’re going to shoot me in the back. There’s no way out.”

The new information follows a series of dramatic early-morning raids Monday, three months after Kim was left bound, gagged, and robbed by a masked gang in the Paris attack.

The terrifying episode by a gang—reported to have worn police uniforms and later fled the scene on bicycles—was the biggest robbery of an individual in France for more than 20 years.

A number of the suspects were described to be “well-known to detectives for armed robbery” and were picked up across France. While most were grabbed in the Paris region, there were also arrests in Normandy and the Riviera.

Police are said to have discovered DNA at the luxury residence where Kardashian, who has 50 million followers on Twitter and 90 million on Instagram, was staying.

Kardashian has spoken about the robbery in a promo clip for the upcoming season of E!’s Keeping Up With the Kardashians, which premieres in March.

The reality-TV star is shown in tears recalling the incident to sisters Kourtney and Khloe Kardashian, saying, “It makes me so upset to think about it.”

She is also shown reacting to news of husband Kanye West’s mental breakdown in November.

Kardashian returned to social media last week, posting pictures of her family on Instagram.

The star was alone at the time of the raid as her German bodyguard, Pascal Duvier, was out at a club with her sisters.