Days after shooting down unidentified aerial objects, the US and Canada scrambled fighter jets to intercept four Russian warplanes as they buzzed North American airspace.

The group of Russian long-range bombers and fighters were detected on Monday by the North American Aerospace Defence Command (NORAD) – the combined US-Canada organisation that provides shared defence of airspace over the two nations – as they approached Alaska.

NORAD said the incident was a routine event and did not pose a threat.

A file photo of a Russian TU-95 bomber similar to one of the aircraft intercepted off North American airspace. (Russian Defence Ministry) (AP)

The Russian flight was also not related to the suspected Chinese spy balloons shot down by the US Air Force over North America during recent weeks.

Two American F-16 warplanes intercepted four Russian aircraft – which included a Tu-95 bomber and Su-35 fighter aircraft – near Alaska.

“Russian aircraft remained in international airspace and did not enter American or Canadian sovereign airspace,” a NORAD statement said.

It added Russian activity “occurs regularly and is not seen as a threat, nor is the activity seen as provocative”.

The interception of the Russian aircraft came as the US military confirmed that the sensors from the first suspected Chinese spy balloon had been recovered from the Atlantic Ocean.

Experts from the FBI are examining the items, which the US says were used to spy on sensitive military sites.

The downing of the balloon on February 4 has been followed by a further three unidentified objects being shot down over North American air space.

The succession of objects, starting with a giant white orb first detected over US skies in late January, has puzzled American officials and stirred curiosity around the world.

Last Friday, NORAD detected and shot down another object near sparsely populated Deadhorse, Alaska.

US experts will examine the censors from recovered wreckage of the Chinese balloon. (Nine)

Later that evening, NORAD detected a third object flying at a high altitude over Alaska.

It crossed into Canadian airspace on Saturday and was over the Yukon, a remote territory, when it was ordered shot down by Canadian Prime Minister Justin Trudeau.

On Sunday, the US military confirmed another unidentified object had been shot down by fighter jets over Lake Huron on the US-Canada border.

Trudeau said on Monday the search in Yukon was of a “fairly large area” in dense wilderness.

Countries with the highest military expenditure in the world

Sign up here to receive our daily newsletters and breaking news alerts, sent straight to your inbox.
You May Also Like

Squatters’ activist is confronted on live TV after grieving daughter suffered disastrous consequences when he exposed her dead father’s address online… and his response is astonishing

A radical tenants’ rights activist who encouraged squatters to move into a…

Albo gets a grumpy new neighbour outside his $4.3m clifftop mansion – and he has a blunt message for the ‘out of touch’ PM

A hardworking father who broke down on national TV after struggling to…

Noem Opens Third Front in War On Haahvaahd: Student Visas

My darling Priscilla-Isaac Jones-Fragnitz: I write with a heavy heart from…

Liz Hayes announces shock career move as she jumps ship from Channel Nine to rival network

Former Channel Nine stalwart Liz Hayes has announced a shock move to…