Four other people were arrested in connection with the theft of the Louvre Museum Paris

French authorities have arrested four more people in connection with last month’s stunning theft of the Crown Jewels worth an estimated €88m (£77m) from the Louvre Museum, a Paris prosecutor said.

“They are two men, aged 38 and 39, and two women, aged 31 and 40, all from the Paris region,” Laure Bequiau said. French media said the arrests included the last alleged member of the four-person gang that stormed the museum.

Le Parisien newspaper, citing police sources, said that anti-gang squad officers arrested the suspected thief on Tuesday morning and he is being held at police headquarters. He faced charges of organized robbery and criminal conspiracy.

Le Parisien said the suspect had a criminal record and was linked to the three alleged members of the gang who have already been arrested and are under official investigation, all of whom are linked to the Paris suburb of Aubervilliers.

The alleged thieves parked a stolen truck outside the museum and used an extension ladder and freight elevator to gain access to the first-floor window of the Apollo Gallery in the Oct. 19 robbery, one of the most sensational robberies in modern French history.

Two people smashed an unsecured window and two glass display cases at the gallery before descending into an elevator and escaping on motorbikes driven by two other people in a daring daylight robbery that lasted less than seven minutes from start to finish.

The gang escaped with eight items, including an emerald and diamond necklace that Napoleon Bonaparte gave to his second wife, Marie Louise, and a tiara studded with 212 pearls and nearly 2,000 diamonds that had previously belonged to Napoleon III’s wife.

None of the jewelry has been recovered yet. DNA analysis of items left at the scene, which included gloves, a high-visibility jacket and disc cutters, led to the arrest a week later of the pair suspected of entering the museum, Ayed J. and Abdulai N.

A third man, Suleiman K, who was suspected of driving one of the two motorcycles used in the robbery, was arrested several days later. One of the men arrested on Tuesday is believed to be the second driver and fourth member of the team.

A fifth suspect accused of helping the gang has also already been charged. France’s state auditor this month described the theft as a “deafening wake-up call” due to the “completely inadequate pace” of security upgrades at the world’s most visited museum.

Louvre management accepted “most” of the auditor’s conclusions. An administrative investigation into the theft highlighted “chronic structural underestimation of the risk of break-ins and theft” and “inadequate security”.