As Jakarta deepens military and coastguard cooperation while rejecting Beijing's sweeping claims, can it maintain a precarious equilibrium? Indonesia is walking a fine line between bolstering ties with Beijing and preserving its long-standing non-aligned stance.

The Philippines said on Saturday it has suspended a scientific survey in the South China Sea after two of its fisheries vessels faced "harassment" and aggressive behaviour from China's coast guard and navy.

Foreign Affairs Minister Sugiono and US Secretary of State Marco Rubio exchanged views on maritime security in the South China Sea.