The Philippines will take "all appropriate actions to cause the removal of barriers" in a disputed area of the South China Sea, the country's national security adviser said Monday.

The Philippines on Sunday shared images of a floating barrier blocking fishing vessel access in the Scarborough Shoal with Chinese coast guard ships nearby, and said it would protect the rights of its fishermen.

"We condemn the installation of floating barriers by Chinese coast guard," national security adviser Eduardo Año said in a statement.