In a security effort, the Transportation Security Administration has taken action against unauthorized drone activity. The TSA reports that over 300 drones have been seized near sites related to the FIFA World Cup. Details about the seizures are limited, but it is known that the incidents occurred since the tournament began.

For more information on the seized drones and the security measures in place, readers can refer to the original report from KTVU FOX 2 News. Further details about the seizures and the World Cup security efforts can be found through the news source, providing additional context and information on the situation.