The Tokyo Metropolitan Government has banned people from flying drones in metropolitan parks and gardens, officials said Tuesday.

The managers of 81 parks and gardens run by the metropolitan government were informed of the decision on April 28. Officials said it was based on an existing ordinance that bans “acts that cause a hindrance to management.”

The ordinance stipulates a fine of up to ¥50,000.

The decision follows a recent incident in which a drone carrying a small amount of radioactive cesium was found on the roof of the prime minister's office.