Mayor Eugenio Bito-onon Jr., who heads a Philippine-claimed region in the disputed Spratly Islands, said he saw the Chinese ships at the Jackson Atoll for two straight days last week while flying in a plane over the area.
Bito-onon said Chinese government vessels have not been stationed at the atoll, which the Philippines calls Quirino, in the years he has been passing by the uninhabited ring-shaped reef.
The Department of Foreign Affairs in Manila said it was trying to verify the reported Chinese presence and a local newspaper report that the Chinese ships recently prevented Filipino fishermen from approaching the area. Chinese Embassy officials were not immediately available for comment.
"I'm alarmed because we frequently pass by that atoll on our way to Pag-asa," Bito-onon told The Associated Press by telephone, referring to the Philippine name for Thitu Island, where he frequently travels to visit a Filipino fishing community guarded by troops. "What will happen now if we sail close with all those Chinese ships?"
Aside from China and the Philippines, Vietnam, Malaysia, Taiwan and Brunei have conflicting territorial claims in the Spratlys.