It is also unclear where the drones come from. It is part of the investigation, says National Police Commissioner Thorkild Fogde, who also participates in the press conference with several authorities.
They may have come from far away or from very close. We have not established any hypothesis, he says.
At the press conference, Fogde also explains why the Danish police have not boarded any foreign vessels, despite the fact that there are such tracks in the investigation that suggest that shipping may be involved.
We do not have sufficient grounds for boarding foreign vessels in Danish waters. There must be a suspicion, he says.
”Classic example”
Finn Borch says that the incidents are a ”classic example of hybrid warfare against a democratic country like ours".
The Danish police stated earlier on Thursday that they suspect there is a connection between the air traffic-disrupting drone activity in Aalborg and Copenhagen.
Several drones were spotted on Wednesday evening near Aalborg Airport. Traffic to and from the airport was stopped. On Thursday morning, the country's second-largest airport, Billund, also had to close its airspace for an hour. Drones have been reported over at least five Danish airports.
But the Danes should not let themselves be intimidated, said Foreign Minister Lars Løkke Rasmussen.
The purpose is to scare us. We should not fall for that. So, therefore: Stay calm and carry on, says Lars Løkke Rasmussen to Danish TV.
Occurred simultaneously
Defense Minister Troels Lund Poulsen said during a press conference on Thursday morning that everything suggests that a professional actor is behind the events.
What we have seen now is a systematic operation that occurred simultaneously – a hybrid attack that threatens our freedom and security.
The drone activity that led the police to close Aalborg Airport for a few hours resembled, according to the police, the one that stopped air traffic to and from Copenhagen on Monday.
It will be a joint investigation with Copenhagen because we believe there is a connection between the incidents, says police inspector Henrik Skals at the police in North Jutland to Danish TV2 on Thursday afternoon, according to Ritzau.
Corrected: In an earlier version of the text, an incorrect title for Finn Borch was used.