MANILA, Philippines -- The United States deployed two warships on Wednesday in a disputed South China Sea shoal, where two Chinese navy and coast guard ships collided two days ago while trying to drive away a smaller Philippine ship in a high-seas accident captured on video, alarming several Western and Asian countries.

First confrontation between Chinese and US warships near Scarborough Shoal in six years comes after a pair of Chinese vessels collide while chasing away a Philippine ship from disputed atoll