A "significant" number of flights from Manchester Airport are expected to be delayed or cancelled due to a "major" power cut, its operator has said.
In a statement released at 06:30 BST, the airport said the issue - which occurred in the early hours of the morning - had caused "widespread disruption" which was affecting flights from Terminals 1 and 2.
The airport said a number of flights had already been cancelled and more were expected to be affected throughout the day.
"Passengers due to fly from Terminal 3 should come to the airport as normal unless advised otherwise by their airline, but could be affected by delays," the airport said.
The flights of those already at the airport would be prioritised as efforts to "work through that backlog" continued, a spokesman said.
The disruption comes at the start of the summer holiday season at the UK's third-busiest airport.
An airport source said the power cut "literally knocked everything off".
It has also affected other businesses in the surrounding area, including major logistics firms nearby.
Bobbi Hadgraft, who is travelling to watch England at Euro 2024, told BBC Radio Manchester she arrived at the airport at about 04:00 BST to see "enormous queues" outside Terminal 1.
"We were worried we would miss our flight," she said, adding the power outage had affected display boards and scanners so staff had to direct passengers around the site.
Others have used social media to complain about long queues for check-in desks and passport control, as well as a lack of communication from staff in the "chaos".
Pictures and video footage showed long queues of people, some waiting in near darkness.
The airport said its electricity supply went off at about 01:30 but has since been restored, although it would take time to get systems up and running again.
