North Korean state TV released new images of Kim Jong-un on Wednesday inspecting military flight drills.

Kim was accompanied by his wife as he watched aircraft of the Korean People's Air Force taking off and landing.

The KRT network did not specify the date or location of the drill.

Also on Wednesday, Pyongyang's top nuclear envoy repeated an offer for international talks over his country's disputed nuclear programme during a meeting in China.

The trip to China comes just days after North Korea called for a rountable with the United States to ease tension that spiked earlier this year when the North threatened the US and South Korea with nuclear war.