Herve Croso, 64, had claimed in his plea that when he boarded the plane from Charles de Gaulle airport at Paris, his luggage was screened and no bullets were found.
However, while boarding the connecting flight to Mumbai from IGI Airport, three cartridges were found, based on which an FIR under the Arms Act was lodged against him.
Croso has sought quashing of the FIR on the ground that the live cartridges were not in his bag when he boarded the plane at Paris and someone appears to have kept the bullets in his bag by tampering with it at Delhi Airport where he stayed for about 13 hours before his flight to Mumbai.
"I am of the view that facts have to be verified during the investigation. Whether the live cartridges were kept by tampering the baggage of petitioner or were carried by the petitioner himself is a subject matter of investigation, which is still on.
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"At this stage, when investigations are still in progress, I do not find any justification to entertain the writ petition and quash the FIR," the court said.
Croso, who arrived in India on November 30, under a multiple entry tourist visa valid from November 7, 2016 to May 6, 2017, has claimed he has no criminal record whatsoever in France, in India or anywhere else in the world.
He has contended, in his plea, that he was not in "conscious possession" of the bullets and "mere custody without the awareness of the nature of such possession does not amount to any offence under the Arms Act".