Last month's jewellery heist at the Louvre museum was carried out by petty criminals rather than organised crime professionals, Paris's prosecutor has said.

This is not quite everyday delinquency... but it is a type of delinquency that we do not generally associate with the upper echelons of organised crime, Laure Beccuau told franceinfo radio.

She said four people arrested and charged so far over the theft that shocked France and the world were clearly local people living in Seine-Saint-Denis, an impoverished area just north of Paris.

Jewels worth €88m (£76m; $102m) were taken from the most-visited museum in the French capital on 19 October.

In a recent interview, Beccuau stated that the arrested suspects, three men and a woman, all reside in Seine-Saint-Denis, with two of the men having prior theft convictions.

The suspects were reportedly able to execute the heist in broad daylight, using a mechanical lift to access the gallery and quickly fleeing on scooters.

Despite their swift actions, one item was dropped, and the other jewelry pieces are believed to have been smuggled out of the country.

In the wake of the heist, the Louvre has increased security measures, which include relocating some of its valuable jewels to the Bank of France.