Philippines protests Beijing's 'provocative acts' in South China Sea
MANILA, Oct 20 (Reuters) - The Philippines has issued a diplomatic protest over Chinese vessels challenging its ships patrolling the South China Sea with sirens, horns and radio communications, its foreign ministry said on Wednesday.
Tensions between Manila and Beijing have been simmering for years in the strategic waterway where both countries have territorial claims.
"These provocative acts threaten the peace, good order, and security of the South China Sea and run contrary to China's obligations under international law," the foreign ministry said on Twitter.