Copenhagen Airport has reopened after being closed due to drone activity. However, there will be delays and some cancelled departures. Passengers are advised to check with their airline for further information, according to a note issued by the airport's authority on its website.

It was closed for four hours on Monday night, when two or three large drone aircraft were flying in its vicinity, according to the officials said it. 

Oslo airport also reopened after four hours of airspace closure and now the operations are resumed.