By Filane Mikee Cervantes and Priam Nepomuceno

President Ferdinand R. Marcos Jr. (RTVM Screengrab)

MANILA – President Ferdinand R. Marcos Jr. on Monday expressed alarm over the sighting of a Russian attack submarine in the West Philippine Sea (WPS), saying it is “very worrisome.”

The submarine was first observed 80 nautical miles west of Cape Calavite in Occidental Mindoro on Nov. 28.

“That’s very concerning. Any intrusion into the West Philippine Sea, of our EEZ (exclusive economic zone), of our baselines is very worrisome. Yes, it’s just another one,” Marcos said in a media interview.

“We will let the military discuss it with you, but I don’t think it is a subject that we should… Let’s just wish a Merry Christmas to all of these people,” he said.

The “UFA-490” is part of the Improved Kilo II class diesel electric attack submarines produced by Russia.

It is equipped with six torpedo tubes, weighs around 2,350 to 3,950 tons, and has a top speed of 20 knots.

“Upon receiving the report, the Philippine Navy immediately deployed assets to monitor and address the situation, ensuring the security of Philippine waters,” the AFP said in a statement, also on Monday.

It added that the missile frigate, BRP Jose Rizal (FF-150) which also has anti-submarine warfare capabilities, was sent and has established radio communications with the Russian submarine, which confirmed its identity, crew complement and navigational intent.

“The Russian vessel stated it was awaiting improved weather conditions before proceeding to Vladivostok, Russia. Philippine naval forces, including FF-150, escorted and monitored operations to ensure the submarine’s compliance with maritime regulations within the Philippine Exclusive Economic Zone,” the AFP said.

The AFP reiterated its “unwavering commitment” to safeguarding the country’s maritime sovereignty while maintaining professionalism in interactions with foreign naval vessels.

“Our operations remain consistent with international maritime laws and demonstrate our dedication to regional peace and cooperation,” the AFP said. (PNA)