New Delhi, Jan. 20 -- Philippine President Ferdinand Marcos Jr. announced Monday the discovery of a new natural gas deposit near the disputed South China Sea, which could shield his country from a potential power crisis.

The "significant discovery" northwest off Palawan province, close to an existing gas field in waters adjacent to the critical waterway, could eventually supply power to more than 5.7 million households or nearly 200,000 schools for a year, Marcos said, adding further tests and another drilling in the area would be done "to pursue more potential gas resources."

The undersea reservoir is estimated to contain about 98 billion cubic feet (2.7 billion cubic meters) of gas. Initial tests showed 60 million cubic feet (1.6 mill...