The Lookout (Twitter)

Reports of a drone/UAV has halted air-taffic at Tromsø Airport - Northern Norway for about an hour today.

Local police has been searching, but no luck so far.

There may be a more normal explanation, but this does sound similar to the UAV incidents in Sweden over the past months
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@Northern_Sentry:
Stor drone observert over flyplassen i #Tromsø. Flytrafikk blokkert politiet leter etter drona. Følge med ⬆️ #hybrid https://t.co/oN4JUhi2YC