Passengers were advised Friday not to bother turning up for flights at Frankfurt airport because of a one-day strike by security staff.
"We have asked passengers not to travel to the airport for now. As things currently stand, the legally required security checks cannot be carried out," a spokesman for airport operator, Fraport, told AFP.
The spokesman said that in total 65 flights had officially been cancelled so far, out of a total 1,300 scheduled for the entire day.
Service industry union Verdi called on members employed by private security contractors to stay away from work between 0100 and 2200 GMT on Friday.
Verdi is fighting for an hourly wage rise to 16 euros ($22), calling an offer by employers of 10-13 euros "far too low".
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