An investigation is under way after at least five drones were spotted flying over Paris.

Reports in France say they were seen flying over the Eiffel Tower, the Louvre Museum and the American Embassy, among other locations.

Police confirmed the presence of drones in Paris airspace and added that an investigation is under way.

In recent months, France has seen dozens of mystery drones flying over nuclear plants and military installations. One flew over the presidential palace.

French authorities have said the drones currently present no threat but the government has asked scientists to help devise ways to counteract the devices.