China dismissed Manila's concern and reiterated that it has "indisputable sovereignty" over the shoal and adjacent waters, without responding or offering any details to the Philippine officials.
Manila alleges environmental sabotage near Second Thomas Shoal in Spratly Islands, says poisoning threatens marine life and troops stationed in contested waters
Experts say North Korea is aiming to show off or review its achievements in the defense sector ahead of its upcoming ruling party congress, the first of its kind in five years.
Philippines is one of four ASEAN member states, along with Brunei, Malaysia and Vietnam, that have contesting claims in the South China Sea linking the Indian and Pacific Oceans.
Chinese coast guard targeted Pagbuaya off the Philippines-occupied Thitu island in the latest flare-up of the long-simmering territorial disputes involving Manila, Beijing and four other governments.
This port call to Malaysia follows Indian Navy's milestone exercise in the area as it successfully achieved maiden mating with foreign submarines in South China Sea during XPR-25.
