German airport's secret emergency plan was on Internet for months: ZDF

epa05225393 Members of the German police patrol the area at the Cologne Bonn Airport in Cologne, Germany, 22 March 2016. German federal police have stepped up their security measures following the terror attacks in Brussels, Belgium, that left many people dead and injured. EPA/HENNING KAISER

BERLIN: A confidential emergency plan for Cologne-Bonn airport was posted on its website for several months, German broadcaster ZDF said, heightening concerns about security after attacks at Brussels airport. 

ZDF said the document, which was over 230 pages long and meant for internal use only, included instructions on how to deal with natural catastrophes and air accidents at the airport as well as terrorist attacks, bomb threats or hostage takings.