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 Sunday interview to franceinfo radio, Beccuau said the four arrested people - three men and a woman - all live more or less in Seine-Saint-Denis. Two of the male suspects had been known to the police, each with multiple theft convictions.


On Saturday, a 38-year-old woman was charged with complicity in organised theft and criminal conspiracy with a view to committing a crime. Separately, a 37-year-old man was charged with theft and criminal conspiracy. Both denied involvement.


Investigators believe four men carried out the daylight theft, with one suspect still at large. The heist was executed using a stolen vehicle-mounted mechanical lift to gain access to the museum's high-security gallery.


The thieves were inside for only four minutes, utilizing a disc cutter to crack open display cases holding precious jewellery before escaping on scooters. A crown was dropped during the frantic getaway, while the other seven stolen items remain missing.


The Louvre has since increased its security measures, transferring some of its most valuable items to the Bank of France for safekeeping.