President Ferdinand Marcos Jr. said on Monday the reported presence of a Russian submarine in the Philippine's exclusive economic zone (EEZ) in the South China Sea was "very worrisome". The Philippine Daily Inquirer newspaper reported on Monday that a Russian attack submarine surfaced inside Manila's EEZ last week,

MANILA: In a rare sighting, a Russian attack submarine surfaced in the West Philippine Sea (South China Sea) last week, multiple security sources told the Inquirer.

For Beijing, the US defence secretary’s revelation of deployment to Task Force Ayungin could be ‘nerve-racking’, says analyst.

Earlier this month, China declared new "baselines" around Scarborough Reef, a large coral atoll topped by a handful of rocks barely above sea level in the South China Sea.

A Russian attack submarine was recently spotted in Philippine waters in a development which President Ferdinand Marcos Jr. said was “worrisome.”