China has conducted military patrols in the South China Sea while the Philippines was holding joint naval drills with the U.S., Japan and Australia, saying Manila is undermining Beijing's claims in the region.

US Defense Secretary Pete Hegseth reaffirmed Washington’s “ironclad” commitment to a mutual defense treaty with the Philippines during a call with his counterpart in Manila in the face of geopolitical tensions in South China Sea.

According to Philippine media reports, the US, the Philippines, Australia, and Japan held a joint maritime exercise in the South China Sea on Wednesday. At the same time, Philippine media did not hesitate to hype the so-called Chinese "monster ship.

Earlier, Chinese naval vessels attracted Manila’s ire as they crossed Basilan Strait on the way to distant-sea training exercise.