The confrontation happened as Philippine supply boats and escort ships attempted to deliver food to forces near a disputed shoal in the South China Sea.

The Chinese coast guard assaulted three Philippine vessels with water cannon blasts Sunday and rammed one of them, causing serious engine damage off a disputed shoal in the South China Sea just a day after similar hostilities at another shoal, the Philippine coast guard said.

The latest confrontation happened near Second Thomas Shoal as two Philippine navy-operated supply boats and Philippine coast guard escort ships were en route to deliver food and other supplies to Filipino forces in a long-marooned navy ship that serves as a territorial outpost, said a coast guard spokesman, Commodore Jay Tarriela.

No other details were provided. Drone video footage and photographs issued by the Philippine coast guard show two Chinese coast guard ships separately blasting water cannons at close range at a Philippine coast guard patrol ship, BRP Cabra, and a smaller supply boat.