According to media reports, several people were injured by gunshots in Paris.
A man was arrested, the newspaper "Le Parisien" reported on Friday afternoon with reference to police circles.
The shots were fired in the tenth arrondissement of the French capital.
The Paris police were initially unable to provide any information about the case.
The broadcaster BFMTV reported that the man was around 60 years old.
"There were seven or eight shots, there is panic," an eyewitness told AFP. Police urged people to avoid the area around Rue d'Enghien in the 10th arrondissement. It's a small street with many people Restaurants, not far from the Grande Boulevards with their famous department stores.
The fire brigade and rescue workers are on duty.