Philippines Demands China End Reef Occupation

The latest confrontation stemmed from an incident on September 7, 2026, involving an unarmed Philippine Coast Guard aircraft on a maritime domain awareness flight over Pag-asa Island, also known as Thitu Island.

Philippine authorities reported a similar action later by Chinese forces at Panganiban Reef. The Philippine Coast Guard characterized the flight as routine and legitimate, emphasizing the unarmed nature of the aircraft.

The Philippine Coast Guard stated that discharging flares against an aircraft in flight endangers flight safety and disregards China's duty of due regard under the Convention on International Civil Aviation. During the same mission, the Philippine air crew observed a significant number of Chinese maritime militia vessels sheltering within the lagoons of Panganiban and Zamora reefs. Despite the vessels, the PCG reported no personnel on their decks or visible movement on the reclaimed facilities.

Rogelio E. Villan Noea Jr., the DFA's Deputy Assistant Secretary and current spokesperson for maritime affairs, reaffirmed the Philippine government's stance that Chinese construction and continuous presence on these features are inconsistent with international law. He specifically urged China to cease its illegal occupation and activities and to comply with the 2016 South China Sea Arbitral Award.

The DFA states that Panganiban Reef is a low tide elevation situated within 200 nautical miles of the Philippines' archipelagic baselines, therefore forming part of the country's exclusive economic zone and continental shelf. Under the law of the sea, such a feature does not automatically generate its own territorial sea, exclusive economic zone, or continental shelf.

It concluded that China's large-scale construction activities there violated Philippine sovereign rights under the United Nations Convention on the Law of the Sea. Although the Permanent Court of Arbitration administered the proceedings, China refused to participate and continues to reject the resulting award.

The DFA maintains that reclamation and construction activities cannot alter the original legal character of either reef.

China, however, strongly disputes this interpretation and continues to claim sovereignty over what Beijing refers to as the Nansha Islands. Chinese embassy deputy spokesperson Gui responded to the September incident by asserting that the Philippine aircraft had entered airspace near Chinese-held features without authorization.

He described the operations at the scene as professional, restrained, and conducted in a standardized manner. Philippine officials rejected this description, with Manila arguing that neither Panganiban nor Zamora can independently generate the territorial airspace China invokes, and that the Philippine Coast Guard aircraft was conducting a legitimate government mission.

The disagreement between the Philippines and China highlights why seemingly routine patrols can quickly escalate into confrontations, as Manila and Beijing operate from fundamentally different interpretations of sovereignty, maritime entitlement, and lawful access. Panganiban Reef has been a sensitive location for decades, with China establishing structures there in 1995. These initial, smaller-scale structures eventually grew through extensive reclamation into a large artificial island with significant infrastructure.

Recent Philippine military statements indicate that the installation on Panganiban Reef now includes a long runway, radar systems, naval berths, and other military-related infrastructure. Philippine officials frequently cite this transformation as an example of how a limited physical presence can evolve into a permanent strategic facility. Pag-asa Island is equally vital to Manila, as the Philippines has maintained a civilian and military presence there for decades, with the island forming part of Kallaya Minapatai in Palawan.

Rear Admiral J. Tristan Tariela, the Philippine Coast Guard spokesperson for the West Philippine Sea, promoted in 2026, stated that the PCG would continue to conduct Maritime Domain Awareness (MDA) flights over the West Philippine Sea undeterred. Philippine authorities increasingly publish photographs, videos, radio exchanges, and operational details after encounters involving Chinese forces.

The Philippine government argues that publicly documenting incidents creates a clearer record of events, making disputed encounters more difficult to characterize solely through competing diplomatic statements. China, conversely, has accused the Philippines of using publicity to exaggerate incidents and create what Beijing considers misleading narratives about Chinese actions. This approach has transformed the dispute into a political one, as well.

As of September 2026, Philippine President Ferdinand R. Marcos Jr.'s administration continues to emphasize Philippine maritime rights while expanding security and defense cooperation with partners including the United States, Japan, and Australia. Marcos has maintained that Manila seeks peaceful management of disputes and does not desire armed conflict. Meanwhile, Chinese President Xi Jinping's government continues to reject the 2016 arbitral award, asserting that its sovereignty and maritime claims in the South China Sea cannot be overturned by the arbitration process.

The situation carries a wider strategic dimension due to the Philippines' status as a treaty ally of the United States. Washington has previously confirmed that the 1951 Mutual Defense Treaty applies to armed attacks on Philippine armed forces, public vessels, or aircraft in the Pacific, including in the South China Sea. While not every incident automatically triggers a military response, the alliance adds a layer of significance to encounters that might otherwise appear limited or local.

China exercises effective physical control over Panganiban and Zamora reefs, having constructed extensive facilities there. The Philippines continues to challenge the legality of this presence through patrols, diplomatic statements, public documentation, and reliance on UNCLOS and the 2016 arbitral award. This leaves little room for a definitive resolution without one side conceding.

Manila argues that reclamation and physical occupation cannot create legal sovereignty where international law does not recognize it. Beijing, conversely, asserts that its sovereignty over the Nansha Islands and surrounding area is established and pledges to continue protecting what it considers Chinese territorial and maritime rights. The September 7 flare incident demonstrates how these conflicting positions are increasingly confronting each other not only through diplomatic statements but directly in the air and at sea.

Philippine aircraft persist in flying surveillance missions, while Chinese forces continue monitoring and challenging these operations. With aircraft moving faster and operating with far smaller safety margins than ships, a flare fired too close, an unexpected maneuver, or a simple misunderstanding could rapidly create a serious emergency. The central question remains unresolved: how long can Philippine and Chinese forces continue operating at such close range under fundamentally different interpretations of the same waters and reefs without an encounter escalating into a larger conflict?