Analysts warn that the dispute over Sabina Shoal could lead to an even more drawn-out struggle between Manila and Beijing

Hopes that tensions in the South China Sea might ease have been short lived. Just weeks after the Philippines and China struck a deal to try to stop dangerous confrontations at Second Thomas Shoal, a new flashpoint has emerged.

Over recent weeks, Manila has accused Chinese personnel of ramming its boats, blasting them with water canon and firing flares at its aircraft, with incidents often centred on a new location, an atoll called Sabina Shoal. It comes as tensions in the South China Sea, a strategically important waterway that links the Indian and Pacific Oceans, were already at their highest in a decade.

Manila alleges ‘harassment’ in past week, including deploying flares just 15 metres away from its aircraft in latest confrontation on strategic waterway

• South China Sea: a visual guide to the key shoals, reefs and islands

The Philippine government accused China on Saturday of firing flares just metres away from one of its aircraft as it flew patrols over the South China Sea in the past week.

A Chinese fighter jet “engaged in irresponsible and dangerous manoeuvres” on 19 August as the plane from the Bureau of Fisheries and Aquatic Resources (BFAR) made a “maritime domain awareness flight” near Scarborough Shoal, the National Task Force for the West Philippine Sea said.