The pilot took the decision to divert the plane after passengers told flight attendants 'that several men were talking about terrorist activities,' a German police spokesman told AFP, without elaborating on the content of their discussion. Passengers on the plane were evacuated using the emergency slides. The Airbus A319 flying from the Slovenian capital Ljubljana was diverted to Germany's Cologne-Bonn airport on Saturday, causing a major police operation and hours of air traffic chaos. Three British men overheard talking about 'terrorist' activities on a London-bound easyJet flight were released on Sunday after being questioned by German police, the airline said.