The Philippines expressed serious concern on Tuesday over what it called "dangerous manoeuvres and unlawful interference" by Chinese vessels during a coast guard supply mission for Filipino fishermen in the Scarborough Shoal in the South China Sea.

The Philippines said it’s “seriously concerned” with the “dangerous maneuvers” of Chinese vessels this week and called out Beijing for its “unlawful interference” with a routine humanitarian operation.

Two Chinese ships collided in the South China Sea Monday while one ship was chasing a Philippines Coast Guard vessel. Both sides claim the Scarborough Shoal.