A Scandinavian airlines flight with 135 people on board, including the Norwegian Crown Prince and Princess, has been evacuated at Copenhagen’s main airport Kastrup after smoke was detected in the cabin.

SAS spokesman Mikkel Thrane says the cabin was filled with smoke due to an engine problem, but that all passengers were evacuated safely early on Sunday.

He says the plane was bound for Oslo and that Norway’s Crown Prince Haakon and Crown Princess Mette-Marit were among the passengers.

Princess Mette-Marit, who is known for her fear of flying, later thanked the SAS crew that managed the evacuation, writing on Twitter that her “morning turned out a bit more exciting than expected.. Phew.. #stillnotentirelyoverflightphobia.”

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