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 defense zone. Seoul said the complaint had been lodged with the defense attaches of both countries in the South Korean capital.

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.