A Russian attack submarine surfaced in the South China Sea to the west of the Philippines last week, prompting Manila to send a warship and aircraft to track it, said the Philippine military on Monday, an appearance that the president said was “very worrisome”.

President Ferdinand Marcos Jr. said on Monday the presence of a Russian attack submarine in the Philippines' exclusive economic zone (EEZ) in the South China Sea was "very worrisome". A Russian Kilo-class submarine was sighted 80 nautical miles off the western province of Occidental Mindoro on Nov.

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,

Philippine President Ferdinand Marcos on Monday described as "very worrisome" the presence of a Russian attack submarine off the country's coast in the disputed South China Sea.Roy Vincent Trinidad, spokesman for the navy in the South China Sea,

A Russian submarine was spotted near the Philippines, in the country's exclusive economic zone in the South China Sea. President Ferdinand Marcos Jr. expressed great concern, according to Reuters. According to media reports,

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