Briefing Why are mysterious drones flying around Paris?

Police are investigating the flight of several drones above the French capital over the past two nights. While their appearance is puzzling – and concerning for security reasons – such craft could become a regular sight in Europe's future.

Francois Mori/AP/File

For the second night in a row, several drones were seen flying over major landmarks in Paris. Police and the public reported at least five sightings overnight Tuesday. The previous night, at least five drones were spotted over the city, including one over the US embassy.