United States authorities and World Cup security teams.
Since the tournament began.
US authorities have seized more than 300 unauthorised drones around World Cup sites. Matchday restrictions ban aircraft and drones within three miles of stadiums and up to 3,000 feet above them.
FBI and TSA teams are using drone detection and mitigation around stadiums and fan zones. Operators breaching restricted airspace can face seizure, criminal charges and fines of up to $100,000.