Military planes have been launched after an unidentified aircraft was spotted approaching a UK area of interest.
The RAF jets are seeking to find out more about the mystery aircraft which was spotted on Wednesday morning.
According to The Mirror Typhoon fighters from RAF Lossiemouth have been scrambled in what they described as a "Quick Reaction Alert."
An RAF spokesperson told the Mirror: "Quick Reaction Alert Typhoon fighters from RAF Lossiemouth, supported by a Voyager Tanker from RAF Brize Norton, have been launched against unidentified aircraft approaching the UK area of interest.
"We will not be offering any additional detail on this ongoing operation until complete," they added.
The RAF says its website says its primary role is to protect the skies of the United Kingdom.
It goes on to explain how a Quick Reaction Alert is carried out when a potential threat is spotted and sees different RAF personnel, stations and aircraft work together to meet any risk to the UK.
It says once spotted the National Air Defence Operations Centre (NADOC) at RAF Air Command, High Wycombe collates information from radar sites across the UK and from civilian air traffic and intelligence agencies.
They decide the threat is sufficient to scramble Typhoon jets and pass the order to to the Control and Reporting Centres (CRCs) at RAF Scampton and RAF Boulmer.
The CRCs have direct contact with the pilots at RAF Lossiemouth and pass on the scramble message.
Pilots at RAF Coningsby are ordered to standby in the cockpits of their Typhoons. RAF Coningsby is the second QRA station in the UK.
Typhoons from 1 (F) squadron at RAF Lossiemouth take off to intercept the rogue aircraft flying on the edge of UK airspace. They travel at supersonic speeds.
RAF air traffic controllers at RAF(U) Swanwick work with their civilian counterparts to ensure the Typhoons can follow the most direct route to their target.
They are embedded within the Swanwick Centre run by NATS, the UK’s main civil air services provider.
RAF Aerospace Systems Operators at RAF High Wycombe and Air Traffic Controllers at RAF(U) Swanwick continuously coordinate the response with the scrambled Typhoon pilots.
An RAF Voyager with air-to-air refuelling capability is put on standby at RAF Brize Norton.
Typhoons can be refuelled in mid-air to extend their range and endurance.
The RAF Typhoons interrupt the rogue aircraft close to UK airspace and escort it north, out of the UK's area of interest.
Once the threat goes the Typhoons are ordered to return to RAF Lossiemouth.
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