Swedish newspaper Dagens Nyheter reported that the sighting of a drone in Stockholm, Sweden caused the closing of the airspace near the city airport.
On December 4, 2014, shortly after 12:00 hours local time, the Stockholm police received reports of a drone flying in the area of the Karolinska University Hospital, which is located about 4 km east of the Stockholm-Bromma Airport. The Swedish CAA then decided to close the Bromma CTR for traffic below 2000 feet. This effectively halted all flights from and to the Bromma Airport.
Brussels Airlines flight SN2303, performed by Avro RJ100 OO-DWF, was forced to divert to Stockholm-Arlanda Airport as a result.
At 12:54 hours the person operating the drone was located and the airspace closure was lifted. The operator claimed he was documenting the construction of a motorway in Stockholm using the drone.