The Southern Theater Command of the Chinese People’s Liberation Army said on Saturday that a Philippine air force aircraft “illegally” entered the airspace above the shoal, which China claims, disrupting its combat training activities.
The command sent jets and ships to identify, track and drive away the Philippine aircraft, it added.
The command warned the Philippines to “stop its infringement, provocation, distortion and hyping-up”.
The United States, Australia and Canada have reported similar actions by Chinese air force aircraft in the past in the South China Sea, where those nations have deployed forces to promote freedom of navigation and overflight.
China has bristled at military deployments by the US and its allies in the disputed region, calling it a danger to regional security.
Aside from China and the Philippines, Brunei, Malaysia, Vietnam and Thailand have overlapping territorial claims in the busy sea passage, a key global trade and security route, but hostilities have particularly flared between Chinese and Philippine coast guard and navy forces in the Scarborough Shoal and another hotly disputed atoll, the Second Thomas Shoal, since last year.
Washington has repeatedly warned that it is obligated to defend the Philippines, its oldest treaty ally in Asia, if Filipino forces, ships and aircraft come under an armed attack, including in the South China Sea.