Taking no chances, Euro 2016 organizers said Tuesday that new technology will be deployed at the June 10-July 10 tournament in 10 French cities to protect against unwanted airborne intruders.

"We've noted the general proliferation of drone-usage in society," Khoury said in his Paris office.

French authorities have been alarmed by dozens of mystery drone overflights of sensitive sites — mostly nuclear facilities, but also military installations and even the presidential palace.

The French gendarmerie already has powerful but not particularly sophisticated portable equipment that could help steer drones away from stadiums by interfering with GPS signals; its drawback is that it could also interfere with GPS signals for civil use, including for aircraft.

"The idea is not to destroy the drones, because there could be collateral damage, notably if they crashed into the public.

"So the risk for matches should be limited.

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