U.S. agencies have seized over 600 drones near FIFA World Cup venues since the start of the tournament on June 11, the Transportation Security Administration said on Monday.

On match days, all aircraft operations, including drones, are prohibited within a radius of three nautical miles and up to 3,000 feet above ground level around the stadiums unless specifically authorized by air traffic controllers. The FBI said the drones have been seized from restricted airspace across all 11 U.S. host cities.

(Reporting by David Shepardson)