Manila summoned Beijing's envoy Monday after the China Coast Guard blocked and water cannoned Philippine vessels, President Ferdinand Marcos said.
Report informs via foreign media that the incident happened Saturday.
The Philippine military and coast guard have accused the China Coast Guard of breaking international law in blocking and firing water cannon at the re-supply mission, which prevented one of the charter boats reaching the shoal.
China said it had taken "necessary controls" against Philippines boats that had "illegally" entered its waters.