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.

Chinese coast guard ships and a Chinese navy helicopter harassed a group of Philippine fisheries vessels conducting a scientific survey in a hotly disputed area of the South China Sea, forcing them to cancel the operation,

Two Philippine ships had to call off their scientific probe after Chinese vessels and a helicopter intercepted them near the Spratly archipelago, according to the Philippines' coast guard.