Personnel responsible for security at three major airports in Germany have planned a strike over salaries.
Verdi, one of Germany’s main trade unions, announced the strike on Wednesday.
The union said the strike would start at the airports of Dusseldorf, Cologne-Bonn, and Stuttgart at 3:00 am (0200 GMT) on Thursday and last for 21 hours.
Thousands of passengers would be affected by the industrial action at the three airports.
Verdi, which represents 23,000 airport security personnel, demands a 17-percent pay raise.
An earlier strike took place on Monday morning at Berlin’s two airports, Tegel and Schoenefeld, forcing the cancelation of about 50 flights.
Hundreds of German passengers were facing travel upheaval with security staff at Berlin’s two airports set to walk out in a pay dispute.
Union leaders want the pay to be raised from 17 euros an hour to 20 euros. The employers have agreed on a pay raise ranging between 2-percent to a maximum of 8.1 percent.
The next round of negotiations between the two sides’ representatives over the dispute is on January 23.