Drone sightings disrupt flights at Copenhagen, Oslo airports

Copenhagen Airport, the busiest in the Nordic region, said it reopened early on Tuesday after drone sightings halted all take-offs and landings for nearly four hours, with Norway's Oslo Airport also re-opened after it had shut its airspace over a drone, Report informs via Reuters.

"The police have launched an intensive investigation to determine what kind of drones these are," Copenhagen Police Deputy Assistant Commissioner Jakob Hansen told reporters. "The drones have disappeared and we have not taken any of them," he added.

Hansen said authorities in Denmark and Norway would cooperate to determine whether there was a link between the two incidents.

The airspace at Oslo airport in Norway was reopened by 3:22 a.m. (0122 GMT), a spokesperson for Norwegian airport operator Avinor said in a statement.

It had been shut since midnight (2200 GMT) due to a drone observation, with all flights diverted to the nearest airport.

Danish police said earlier on Monday that two or three large drones had been seen flying near Copenhagen's airport, closing it to all traffic.