The threat was made against flight 826 at Germany’s Cologne-Bonn airport on Sunday evening, just as it was taxiing towards the runway to fly to Milan, Italy, according to the airline.

Germanwings, a budget airline owned by Lufthansa, says that the airport tower in Cologne alerted the pilot that the Airbus A320 had received a threat by email 15 minutes before the plane was scheduled to leave.

Instead of taking off, the plane was taken to a safe position where the passengers and crew were evacuated. Federal police were brought in to investigate but sniffer dogs found no evidence of explosives, a German news agency reported.