British Airways passengers are facing lengthy delays after an IT glitch hit check-in desks.
Travellers have complained of long queues with system problems reported at airports globally including: Amsterdam, Berlin, Chicago, Denver, London, San Francisco and Rome.
Responding to passengers on Twitter, the airline wrote: "We apologise to our customers for the delay and we appreciate their patience as our IT teams work to resolve this issue."
It added: "Our colleagues are doing everything possible to check in customers for their journey."
In July, BA apologised after problems with its new check-in system caused delays. The system was first installed at airports across the world in October last year, and the roll-out was completed earlier in 2016.
Last month, Delta had to cancel hundreds of services after a systems failure grounded flights.
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