Norad says Canadian and American fighter jets have intercepted a group of Russian and Chinese planes flying near Alaska.

The North American Aerospace Defence Command says the planes were detected and tracked on Wednesday.

The planes stayed in international airspace and their activity is not seen as a threat.

U.S. officials say it鈥檚 the first time Norad has intercepted aircraft from the two countries together.

Military leaders in Canada have been warning that Russia and China are becoming increasingly competitive in the Arctic.

Arctic defence is the focus of Canada鈥檚 new defence policy and the U.S. recently issued an Arctic strategy of its own.

鈥淣orad will continue to monitor competitor activity near North America and meet presence with presence,鈥� Norad said in a news release on Thursday.

The planes were detected in the Alaska Air Defence Identification Zone, an area beyond U.S. and Canadian sovereign airspace. Norad says both countries require aircraft in that zone to be identified for national security reasons.

China and Russia confirmed Thursday that they had conducted a joint air patrol over the Bering Sea, which divides Russia and Alaska.

The Russian Defence Ministry said the joint patrol also flew over the Chukchi Sea, which is on the north side of the Bering Strait.

Russian fighter jets and strategic bombers were joined by Chinese strategic bombers in the exercises, which lasted more than five hours, the ministry said.

The joint patrol tested and improved co-ordination between the two air forces, said Zhang Xiaogang, a spokesperson for China鈥檚 Defence Ministry. He said it was the eighth joint strategic air patrol since 2019. He declined to comment when asked if it was the first such patrol over the Bering Sea.