The Philippines urged China on Sunday to recall more than 200 Chinese boats it said had been spotted at a reef in the South China Sea, saying the presence of the vessels violated its maritime rights as it claims ownership of the area.

Authorities said the Philippines coast guard had reported that about 220 vessels, believed to be manned by Chinese maritime militia personnel, were seen moored at the Whitsun Reef, which Manila calls the Julian Felipe Reef, on March 7.

"We call on the Chinese to stop this incursion and immediately recall these boats violating our maritime rights and encroaching into our sovereign territory," Defense Minister Delfin Lorenzana said.