Manila says it is running out of options in its dispute with Beijing . It says it will challenge China 's claims to the South China Sea at a tribunal . As a result , Manila is challenging China 's claims , which include the waters off the west coast of the Philippines , at an international arbitration tribunal , citing the United Nations Convention on the Law of the Sea . It cites the United Nations Convention on the Law of the Sea . China is involved in territorial disputes with several of its neighbors .
Manila says it is running out of options in its dispute with Beijing . It says it will challenge China 's claims to the South China Sea at a tribunal . It cites the United Nations Convention on the Law of the Sea . China is involved in territorial disputes with several of its neighbors .