Philippine authorities have accused a Chinese military helicopter of engaging in what they described as an "unnecessary act of intimidation" during an operation near disputed territories in the South China Sea. The incident is the latest in a series of maritime confrontations between Manila and Beijing.

On Saturday, personnel from the Philippine Coast Guard (PCG), Philippine Navy, and Philippine National Police Maritime Group were conducting an operation to investigate suspected blast fishing near Sandy Cays 2 and 3, approximately three nautical miles west of Thitu Island, also known as Pag-asa by the Philippines. During the operation, two China Coast Guard vessels reportedly sounded their horns, issued radio challenges to the Philippine team, and subsequently shadowed and blocked the Philippine boats. Additionally, a People's Liberation Army Navy helicopter circled overhead four times.

The Philippine team attempted to stop a foreign fishing vessel involved, issuing multiple radio commands, but the vessel ignored these orders and proceeded southwest towards Subi Reef. Subi Reef is one of seven artificial islands constructed by China in the Spratly Islands to bolster its sovereignty claims. Due to safety concerns, Philippine authorities ceased pursuit and returned to Thitu Island.

The PCG stated that the China Coast Guard vessels have no legal enforcement authority within the territorial waters surrounding Thitu and criticized their actions for enabling the suspected violator to evade apprehension. Filipino officials also rejected Chinese assertions that their vessels had been expelled from the area.

Thitu Island, measuring just 37 hectares (0.14 square miles), is the largest of the nine features occupied by the Philippines in the Spratly archipelago. It lies about 450 kilometers (280 miles) from the Philippine mainland and is considered a strategically valuable location by Manila.

In a separate occurrence, the Armed Forces of the Philippines reported that a Chinese J-16 fighter jet made multiple close approaches and maneuvers near a Philippine patrol aircraft over the disputed Scarborough Shoal on Saturday. The military characterized these close encounters as a recurring pattern of unsafe and coercive behavior by China against Philippine vessels and aircraft engaged in lawful operations, raising aviation safety concerns.

As of this report, the Chinese Embassy in Manila had not provided a response to requests for comment regarding the incidents.