Mischief Reef
The agreement was promptly violated by PRC and Malaysia: claiming storm damage, seven PLA Navy vessels entered the area to repair "fishing shelters" in Panganiban Reef (Mischief Reef); Malaysia erected a structure on Investigator Shoal and landed at Rizal Reef (Commodore Reef). In response, the Philippines lodged formal protests, demanded the removal of the structures, increased naval patrols in Kalayaan, and issued invitations to American politicians to inspect the PRC bases by plane.