June 23 (UPI) — Federal air marshals have seized more than 300 drones during World Cup events in the United States, the Transportation Security Administration said Tuesday.

The TSA said the air marshals, working with state and federal officials, confiscated the devices, though the agency didn’t specify how many from each of the 11 U.S. World Cup venue cities.

“Flying a drone in a restricted zone is a federal crime and can result in fines up to $100,000, prison time and drone confiscation,” the TSA said in a post on X.

World Cup events are being held in 16 North American cities — two in Canada, three in Mexico and 11 in the United States. Among the U.S. cities hosting events are Atlanta, Boston, Dallas, Houston, Kansas City, Los Angeles, Miami, New York City, New Jersey, Philadelphia, San Francisco and Seattle.