Flights in and out of Manchester Airport have been hit by delays after a computer glitch.
An airport spokeswoman described the problem as "minor" but was unable to say how many flights or how many passengers have been affected since the problem began at around 7pm.
The airport is the UK's third biggest, handling more than 22m passengers a year.
In a statement on Tuesday evening the airport said: "Due to a technical issue with our Electronic Flight Progress Strip System - which is used to manage the safe movement of aircraft on taxiways, runways and in the immediate airspace surrounding the airport - we are experiencing some minor delays for both arriving and departing aircraft.
"If you are due to fly from Manchester this evening, you are advised to monitor live departure information or contact your airline for further information.
"Engineers are currently working to rectify the situation as soon as possible and we apologise for any inconvenience to passengers.
"The safety of our passengers is our number one priority and we will work to return the airport to full operation at the earliest opportunity.
"We will provide a further update in due course."
The airport advised travellers to check their website for updates and flight details.