Norway’s Oslo airport temporarily paused landings early on Monday after a report of a drone sighting near the airport, news agency NTB reported.

Axar.az reports, citing Reuters, several arriving flights were delayed or diverted after police received a report around midnight that a Norwegian Air pilot thought he saw three to five drones during an approach to the airport, the Norwegian news outlet reported, citing police.

NTB reported that the observation remained unverified and that all operations had resumed at the airport.

European aviation has repeatedly been thrown into chaos in recent weeks by drone sightings and air incursions, including at airports in Copenhagen, Oslo and Munich.