Northern Ireland’s largest airports have been affected by a major IT outage which is affecting industries across the world.

Belfast International Airport reported longer waiting times and Belfast City Airport advised passengers to check the status of their flights due to the disruption.

Flights at both sites remain operational.

Dublin Airport has asked all passengers to arrive at least three hours early for their flights.

American Airlines said problems have been caused by issues with Crowdstrike cybersecurity software.

Dublin Port estate is fully operational this morning after what it described as some brief traffic congestion earlier.

Some banks and media outlets globally have been impacted.

Microsoft has said it is taking mitigation action to deal with the problem.

Aviation analytics firm Cirium has suggested more than 1,000 flights have been cancelled.

Ryanair has also advised its passengers arrive three hours before their scheduled departure times due to a “global third party IT outage which is out of our control”.

“If you’re due to travel today and have not already checked-in for your flight, you can do so at the airport,” the airline said in a social media post.

Belfast International Airport have said that the global IT system outrage is impacting the airport but that “flights remain operational”.

In a statement, the Belfast International airport said that IT teams are “working hard to resolve the issue but there are longer wait times than usual”, thanking passengers for their “patience while the issue is resolved”.

Belfast City Airport said although flights operations “have not been directly affected” there will be “disruption across global networks” and passengers are therefore “advised to check the status of their flights”.

Some railway companies and NHS services across the UK are also reporting problems.

The cause of the outage is not known, but computer giant Microsoft said it is dealing with “the lingering impact” of the outage.