The arsenal was discovered early today in Evry, in an unlocked private parking garage inside a shopping centre near a commuter rail station, a source at the public prosecutor's office said.
"Nothing in this discovery leads us to believe there is a link to terrorism," the source added.
Last year's terrorist attacks in Paris, in which 130 people were killed, were carried out with weapons manufactured in Serbia.
France and Serbia last month launched a joint effort to crack down on arms smuggling from the Balkans region, which is still awash in weapons from its wars in the 1990s.
An inquiry has been opened involving the judicial police as well as a special interregional unit focussed on organised crime.
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