A dangerous new flashpoint is fast emerging in the South China Sea

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A stretch of uninhabited, low-lying reefs in the South China Sea is fast becoming a dangerous new flashpoint between China and the Philippines, dealing a blow to recent efforts to de-escalate tensions in one of the world’s most vital waterways.

Over the past week, Chinese and Philippine vessels have engaged in multiple collisions and face-offs near Sabina Shoal, a disputed atoll lying just 86 miles from the Philippines’ west coast and 745 miles from China, which claims almost all of the South China Sea as its sovereign territory despite an international ruling to the contrary.

The violent confrontations came just weeks after Beijing and Manila struck a temporary deal to lower tensions that had been rising all summer at another nearby reef, where China’s increasingly aggressive tactics had raised alarm across the region as well as in Washington, a mutual defense ally of the Philippines.

Renewed tension in the South China Sea is expected to be on the agenda of meetings between US national security adviser Jake Sullivan and Chinese Foreign Minister Wang Yi during Sullivan’s visit to China this week.

Following a particularly violent encounter at the Second Thomas Shoal in June, which saw Chinese coast guard personnel brandishing axes at Filipino soldiers and slashing their rubber boats, Chinese and Philippine officials sat down for talks and agreed to de-escalate.

For a while, tensions appeared to be cooling, but the detente proved short lived.

On August 19, in the middle of the night, coast guard ships from China and the Philippines collided near