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 Jr. said the presence of a Russian submarine in the Southeast Asian nation’s waters is “very concerning” as its military vowed to continue safeguarding its maritime sovereignty.

President Bongbong Marcos says the recent sighting of a Russian attack submarine in the West Philippine Sea is "very worrisome."

President Ferdinand Marcos Jr. said on Monday the presence of a Russian attack submarine in the Philippines' exclusive economic zone in the South China Sea was "very worrisome".

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