Mystery drones have been spotted flying over central Paris for the second night.

French police are no closer to knowing who is operating them.

There were five sightings by between 23:00 on February 24 and 02:00 on February 25, French media report.

Up to three drones were seen near the Invalides military museum, Place de la Concorde and two of the old city gates.

Flying drones over Paris at night is illegal and daytime flights require authorization from city authorities.

Five drones were seen the previous night in similar areas, including the Eiffel Tower and above the US embassy, close to Place de la Concorde.

However, some of the latest drone flights have been captured on film and will be analyzed by a 10-strong team of investigators set up after the first incidents.

The new sightings were also on the fringes of central Paris, at the key transport gates of Porte de Clignancourt in the north and Porte de Saint-Cloud in the south-west.

Small drones are inexpensive and easy to buy but their appearance in recent months over sensitive locations has worried French authorities.

It is against the law for any aircraft to fly lower than 19,700ft over central Paris. Flying any aircraft under that ceiling – including drones, police helicopters, and air ambulances – requires permission from city authorities.

Flying a drone at night is banned completely.

Drones present a problem for authorities in built-up areas, in that shooting them down could endanger the public. It is possible to jam GPS or radio signals guiding them.

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