MANILA, Philippines -- The Philippines on Sunday presented evidence to an international tribunal against China's sweeping territorial claims in the South China Sea, despite Beijing's warning that the case will damage ties.

Foreign Secretary Albert del Rosario told a news conference that the documents submitted electronically to the tribunal in The Hague consist of nearly 4,000 pages of analysis and documentary evidence.

Filipino officials took their territorial disputes with China to international arbitration in January 2013 after Chinese government ships took control of a disputed shoal off the northwestern Philippines. They asked the tribunal to declare China's claims to about 80 per cent of the strategic waters and Beijing's seizure of eight South China Sea shoals and reefs illegal.

Chinese Foreign Ministry spokesman Hong Lei told a news conference Wednesday that China will never accept nor participate in the international arbitration pushed by the Philippines.

The Philippines has urged other claimants to join the case, but none have so far publicly stepped forward.

China, Brunei, Malaysia, the Philippines, Taiwan and Vietnam have overlapping claims across the busy South China Sea.

China has asked other claimants to settle the disputes through one-on-one negotiations, something that would give it advantage because of its sheer size and clout. It has also warned Washington not to get involved.

"With firm conviction, the ultimate purpose of the memorial is our national interest," del Rosario said. "It is about defending what is legitimately ours."

The disputes have periodically erupted into dangerous confrontations, sparking tensions and straining ties.

In the latest incident, a Philippine government ship slipped past a Chinese coast guard blockade Saturday and brought food and fresh troops to a navy ship marooned on Second Thomas Shoal and used as a base by Filipino troops to bolster the country's territorial claims in the area.