Watch: Blue screens, queues and airport delays worldwide

A mass IT outage has caused travel chaos all around the world, with many flights grounded, huge queues and delays at airports.

Several airports and airlines have reported issues with their IT systems.

Berlin airport posted on X, formerly known as Twitter, that it is experiencing delays to check-ins due to a "technical fault", and in Spain, an "incident" has been reported at all of the country's airports.

Cyber-security firm Crowdstrike says the problem was caused by a "defect" in one of its software updates.