French police have evacuated and sealed off the railway station in the southern town of Nimes following reports of shooting on Saturday evening.
A national police official denied the initial reports of a shooting incident at the station and described the police activity as a "verification" operation.
Police ordered commuters to rapidly leave the train station at around 21:15 local time, the Midi Libre newspaper reported.
The spokesman said the man has no apparent connection to Thursday's attacks around Barcelona, about 380km southwest of Nimes.More news: President Trump says removal of Confederate monuments is 'so foolish'
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The officials, who were not authorized to be publicly named, said no one has been reported hurt in the operation.
Local authorities advised passengers to avoid the train station until further notice.
Cops reportedly boarded a TGV train in Nimes which had been travelling from Paris to Montpelier to search for suspects.
On their official Twitter page, French government officials in Gard, said the police have completed their investigations in the area, "against a suspicious report".