[ejolto]

The arrest in Oslo were a married couple from Signapore in their 60s. The man was fined and 8000 NOK for admitting to flying the drone and might get deported. They were flying in central Oslo, and it seems unrelated to the drones in Denmark.

There were also unconfirmed sightings of drones around the airport in Oslo. The director of police states that "It is still unclear what was observed. There are conflicting interpretations of the observations that were made".

[Tankenstein]

Thank you for the additional context. Based on this, I agree that Oslo might not actually be related.