It resulted in an encounter that lasted several hours before the Philippine ships turned back.

Tensions between Manila and Beijing remain high after the Philippines coast guard cut China’s barriers in disputed waters last month.

Manila resupplies its outpost in the Second Thomas Shoal, in the Spratly Islands, every month to reinforce its economic rights to waters that are both rich in fish and mineral resources.

Beijing claims almost the entire South China Sea, including the Spratlys, which is also claimed in part by the Philippines.