Several people called the police to report the flying object on Thursday evening.
Policemen who were called to the scene saw the drone themselves, and have documented the flight. A report of a crime against the aviation law has been filed.
The navy also received a report of an observation of the drone on Thursday evening, roughly at the same time as the police, says press officer Jimmie Adamsson.
It was found that it was not over or in direct connection to any protected object, therefore it is the police who are handling the matter, he says.
In recent days, several drone alarms have occurred, especially in Denmark where major disruptions have led to the closure of Danish airspace.
