US and Philippine forces sank a decommissioned China-made Philippine Navy ship Wednesday during South China Sea war games simulating an attack on an enemy vessel, officials said.

The exercises are being held near the city of Laoag, around 400 kilometers (250 miles) south of Taiwan, amid a backdrop of increased confrontations between Philippine and Chinese vessels around South China Sea features claimed by Manila and Beijing.

The BRP Lake Caliraya, a small tanker decommissioned by the Philippine Navy in 2020, slowly dipped below the water after being struck by waves of anti-ship missiles, rockets, cannon fire and land-based artillery off Laoag, they said.

A navy fast-attack craft and frigate, an air force fighter and helicopter and land-based artillery from the Philippine military, as well as a US F-16 fighter and an AC-130 gunship, took part in the attack on the simulated enemy vessel, they added.

The participants had "a mission of trying to prevent an aggressor from landing on the Philippine soil," Lt. Col. Omar Al Assaf, lead Philippine planner for Wednesday's activity, told reporters.

"The ability of both the US and the Filipino army and air force to work together to achieve this is extremely lethal," said Lt. Col. Matt Cahill, commander of a US Army unit taking part in the war games.

He compared it to team sports in which "you don't take the field with a new team, right before the big game," but must practice together beforehand.

The Philippine military earlier ruled out any symbolism in the choice of a China-made ship as target practice for the allies.

"There is no issue with that. The vessel has been used in the Philippines for a long, long time. So any attachment, if ever there is, doesn't matter at all," said Philippine Navy chief Vice Adm. Toribio Adaci.

More than 16,700 Philippine and US troops are taking part in the annual military drills — dubbed Balikatan, or "shoulder to shoulder" in Tagalog — in multiple locations across the Asian archipelago.

Journalists watched Wednesday's event on video screens beamed toward a strip of sand dunes where, two days earlier, the two allies had also conducted a live-fire exercise with missiles and artillery to stop an imaginary invasion force landing on the Philippines' north coast.

Beijing claims almost the entire South China Sea, despite an international ruling that its assertion has no legal basis. It deploys hundreds of coast guard, navy and other vessels to patrol and militarize the waters.

Asked about the drills, China's foreign ministry warned Monday that "any military exercise should not be targeted at or harm the interests of third parties."

"Countries in the region can all see clearly who is currently provoking military confrontation and escalating tensions in the region," spokesman Lin Jian said.