The Airport Authority on Monday said all of the displays are working normally at Hong Kong International Airport, after a computer glitch on Sunday caused displays, the airport's website, and the MyHKG app to stop updating real-time flight information.

In a statement, the authority said all the flight information display screens - including those in the departure halls, arrival halls, boarding gates and baggage reclaim halls - were operating normally. It said there had been a thorough check-up in the early hours.

The authority also said its website and the MyHKG app were operating normally and were providing real-time flight information. It said flights continue to operate normally but it was advising passengers to refer to the latest flight information and to allow sufficient time to check in.

On Sunday, the authority's executive director of engineering and technology, Ricky Leung, said there was no evidence it was a hacking attack.