Anyone with an interest in military aircraft would have got quite a shock looking up and seeing a Russian jet over the skies of King's Lynn.
The Russian-made Sukhoi Su-30MKI was, however, being flown by the Indian Air Force as part of a training mission with the RAF.
Typhoon jets from RAF Coningsby near Boston, Lincolnshire were also taking part in the exercise, which led some on the ground to think that the plane was being escorted out of British airspace.
A spokesman from the base confirmed it was a scheduled procedure.
The twinjet air superiority fighter was developed by Russia's Sukhoi and built under licence by India's Hindustan Aeronautics Limited for the Indian Air Force.
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