According to reports, two Russian bombers are on a course that would bring them into British airspace.
Royal Air Force Typhoon fighter jets have been scrambled to intercept the bombers.
A MoD spokesperson said that the bombers had not entered British airspace, but were in the country’s “area of interest”. The jets are said to be escorting the bombers over the North Sea.
British airspace extends 12 miles off the coast.