China says it scrambled fighter jets to monitor US and Japanese planes as they flew in its newly declared air defence zone in the East China Sea on Friday.
The zone covers territory claimed by China, Japan, Taiwan and South Korea.
China said last week that all aircraft crossing through the zone must file flight plans and identify themselves or face “defensive emergency measures”.
The US, Japan and South Korea say they have since defied the ruling and flown military aircraft in the area.
Read the rest of the story: BBC News – China scrambles jets in air zone to monitor US and Japanese planes.