WATCH: Pentagon holds briefing as Philippines warn of countermeasures against China at sea

MANILA, Philippines (AP) — The Philippine president said Thursday that his government would take action against what he called dangerous attacks by the Chinese coast guard and suspected militia ships in the disputed South China Sea, saying “Filipinos do not yield.”

Watch the briefing in the player above.

Ferdinand Marcos Jr. did not provide details of the actions his government would take in the succeeding weeks but said these would be “proportionate, deliberate and reasonable in the face of the open, unabating, and illegal, coercive, aggressive and dangerous attacks by agents of the China coast guard and Chinese maritime militia.”

“We seek no conflict with any nation,” Marcos wrote on X, formerly Twitter, but said the would not be “cowed into silence.”

Marcos’s warning is the latest sign of the escalating disputes between China and the Philippines in the contested waters that have caused minor collisions between the coast guard and other vessels of the rival claimant nations, sparked a war of words and strained relations.

China and the Philippines, along with Vietnam, Malaysia, Taiwan and Brunei, have overlapping claims in the resource-rich and busy waterway, where a bulk of the world’s commerce and oil transits.

Chinese officials in Manila or Beijing did not immediately respond to Marcos’s public warning, which he issued during Holy Week — one of the most sacred religious periods in the largely Roman Catholic nation.

China’s defense ministry accused the Philippines of escalating the South China Sea disputes by undertaking provocative moves and spreading “misinformation to mislead the international community.”

“It is straying further down a dangerous path,” Senior Col. Wu Qian, the Chinese defense ministry’s top spokesperson, said in a statement issued Thursday by the Chinese Embassy in Manila.

Both China and the Philippines said they were acting to protect their sovereignty. Wu said China remained “committed to properly managing maritime differences,” while Marcos said he had been in touch with international allies who had offered to help the Philippines.

Marcos said he issued his statement after meeting top Philippine defense and national security officials, who