Seoul's Joint Chiefs of Staff said Russian, Chinese planes entered its air defence zone during the joint exercise.

South Korea scrambles jets as Chinese and Russian warplanes enter its air defence zone without breaching territorial airspace.

Seoul's Joint Chiefs of Staff said Russian, Chinese planes entered its air defence zone during the joint exercise.

Seoul says it will "actively respond" to neighbouring countries' activities in its air defence zone.

SEOUL: South Korea said it had lodged a protest with representatives of China and Russia on Wednesday, a day after Seoul said those countries’ warplanes had entered its air…