PARIS — In a signal of the French government’s concern about unauthorized drone flights in the capital, the Paris police detained three Al Jazeera journalists who were flying and filming a drone in a large park on the western edge of the city, according to a French prosecutor’s office.

The arrests came after a second straight night of unidentified flying objects being spotted over some of Paris’s most identifiable landmarks, Paris police officials said Wednesday, fanning the anxiety over the phenomenon that began to raise worries late last year.

There was no apparent link between the arrests and the flights over central Paris on Monday and Tuesday nights, said Agnès Thibault-Lecuivre, the spokeswoman for the Paris prosecutor. “One mustn’t conflate the two,” she said.

One of the Al Jazeera journalists, Tristan Redman, worked previously at The International Herald Tribune, now known as the International New York Times.