The Philippines and China are trading accusations over the latest clashes between their vessels in the disputed South China Sea. The Philippines called China's targeting of its ships a "serious escalation," while Beijing said Manila is fully responsible for the incidents.

The two sides' vessels faced off on both Saturday and Sunday.

The Philippine government said Chinese vessels obstructed its military resupply boats and patrol ships on Sunday near Second Thomas Shoal. It released footage showing Chinese vessels firing water cannons and one of the Chinese ships ramming a resupply boat. Manila says 46 ships of China's coast guard, navy and maritime militia were in the area.

A Philippine National Security Council spokesperson said on Monday that the Philippines will never be deterred from exercising legal rights over its maritime zones, which include its exclusive economic zone and continental shelf.

The Philippine foreign ministry said it summoned the Chinese ambassador and lodged a protest.

President Ferdinand Marcos Jr. said on social media that China's "illegal presence" in his country's waters and "dangerous actions" against its citizens are "an outright and blatant violation of international law."

Beijing urged Manila to stop what it called provocations.

A Chinese Foreign Ministry spokesperson said the Philippines' actions seriously violated China's sovereignty. She said that the China Coast Guard took necessary measures in accordance with domestic and international laws, and the operations were professional, restrained and legal.

A similar confrontation took place on Saturday near Scarborough Shoal. Manila says Chinese coast guard ships fired water cannons several times at three Philippine vessels.

Meanwhile, a private organization in the Philippines had planned to deliver relief supplies for Christmas to military personnel living on an outpost in Second Thomas Shoal. But the organization said its vessel was forced to change that plan after it was chased by Chinese warships and other Chinese boats on Sunday.