Early flight passengers at Brussels Airport faced disturbances as terminals were hit by the last day of a work to rule police action on Friday.
Long queues at the airport's security checkpoints were reported shortly before 9:00 AM, as unions arrived at the airport brandishing flagstaffs.
The action also brought disturbances to vehicle circulation, with traffic jams reported at the entrance of the airport after unions blocked off one of the car lanes.
- Airport police work to rule will end after Friday
- Brussels Airport police strikes: delays will go on throughout the week
Brussels Airport advised passengers on international flights Friday to come to the airport at least three hours in advance, or two hours for those travelling inside the Schengen zone.
Passengers on Twitter said that waiting times in the queue went up to over two hours, with only half of the booths in passport control operating.
Federal police are protesting a continuing failure from management to address complaints of understaffing and lack of equipment, in an action which hits the airport during the busy carnival season.
"The general atmosphere is quite stressed, with a lot of passengers appearing to be late to their flights," according to a Brussels Times reporter on-site.
The action is expected to be suspended from Saturday ahead of a new round of talks, unions announced in a press release.
The Brussels Times