This videograb by the Armed Forces of the Philippines shows a collision between a Chinese Coast Guard ship (L) and Philippines' resupply boat (R) near the Second Thomas Shoal, in the disputed South China Sea
This videograb by the Armed Forces of the Philippines shows a collision between a Chinese Coast Guard ship (L) and Philippines' resupply boat (R) near the Second Thomas Shoal, in the disputed South China Sea AFP

Manila said Monday that Chinese vessels "intentionally hit" Philippine boats at the weekend, escalating a diplomatic row over two collisions in the South China Sea.

The countries have traded blame over Sunday's incidents near Second Thomas Shoal in the Spratly Islands, with both sides filing diplomatic protests and releasing videos to support their accusations.

The two collisions happened during a Philippine resupply mission to troops stationed on a navy vessel that was grounded on the shoal in 1999 to assert Manila's territorial claims.

Philippine officials accused a Chinese coastguard ship and a "militia" vessel of "dangerous maneuvering" that resulted in collisions with a Philippine resupply boat and a Philippine Coast Guard vessel.

Philippine Defense Secretary Gilbert Teodoro took it one step further Monday, labelling the Chinese actions near Second Thomas Shoal deliberate.

"Chinese coast guard and maritime militia vessels, in blatant violation of international law, harassed and intentionally hit Unaiza May 2 and Philippine Coast Guard vessel BRP Cabra," Teodoro said.

"We are here to really decry in the strongest possible terms this egregious violation and illegal act within the (Philippines') 200 nautical mile exclusive economic zone and the obfuscation of the truth by China's distorting the story to fit its own ends."

His comments came hours after Philippine President Ferdinand Marcos met with security officials and ordered the coastguard to investigate the incident, which was "being taken seriously at the highest level of government", his communications team said.

Earlier Monday, the Philippine foreign ministry summoned China's ambassador to Manila, Huang Xilian, and lodged a diplomatic protest over the incident.

Spokeswoman Teresita Daza said the ambassador was unavailable and was represented by his deputy chief of mission, Zhou Zhiyong.

"Ayungin Shoal is part of our exclusive economic zone and continental shelf and we have sovereign rights and jurisdiction over it," Daza said, using the Philippine name for the shoal.

The Chinese diplomat made "solemn representations... expressing strong dissatisfaction and resolute opposition to the trespassing" by Philippine vessels into the Ren'ai Reef area, the Chinese embassy said, using China's name for the shoal.

China has said a "slight collision" happened after the Philippine resupply boat ignored "multiple warnings and deliberately passed through law enforcement in an unprofessional and dangerous manner".

Manila's longtime ally Washington has led a chorus of international criticism of China's alleged interference in the routine resupply mission to the tiny garrison on the grounded BRP Sierra Madre.

The US State Department on Sunday reiterated its mutual defence pact with the Philippines "extends to armed attacks on Philippine armed forces, public vessels, and aircraft -- including those of its Coast Guard -- anywhere in the South China Sea".

China claims almost the entire South China Sea, through which trillions of dollars in trade passes annually, and has ignored a 2016 international ruling that its assertion has no legal basis.

Second Thomas Shoal is about 200 kilometres (124 miles) from the western Philippine island of Palawan, and more than 1,000 kilometres from China's nearest major landmass, Hainan island.

Previously warm ties between Manila and Beijing have cooled since Marcos took power in June 2022, as he seeks stronger relations with the United States.

The Marcos administration has publicly criticised Chinese actions in the South China Sea, publishing photos and videos to support its claims of Chinese harassment and the blocking of its vessels.

Beijing has released its own images of the incidents.

"We do not respond to lies, we only comment on facts," Jay Tarriela, the Philippine Coast Guard spokesperson for the West Philippine Sea, said in a post on X Monday.

"Our narratives are always backed with compelling images and unedited videos."

Despite the challenges, the Philippines would "continue to do what is necessary" to supply its troops on the BRP Sierra Madre with provisions, said Jonathan Malaya, assistant director general of the National Security Council.

"This is the Philippines implementing the 2016 arbitral ruling," Malaya told reporters Monday.

"The arbitral ruling is binding not only to the Philippines but also to China."

Manila and Beijing have a long history of maritime disputes in the South China Sea.

Tensions flared in August when China Coast Guard vessels used water cannon against a Philippine resupply mission to Second Thomas Shoal, preventing one of the boats from delivering its cargo.

Map showing claims and major outposts on the disputed Spratly Islands.
Map showing claims and major outposts on the disputed Spratly Islands. AFP
Map showing the extent of disputed claims in the South China Sea.
Map showing the extent of disputed claims in the South China Sea. AFP