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.

The Philippines coastguard claims that a fighter tailed one of its aircraft and performed manoeuvres at close proximity.

The U.S. deployed two warships Wednesday to a disputed South China Sea shoal where two Chinese ships collided earlier in the week while trying to drive away a smaller Philippine ship in a high-seas incident that raised alarms about maritime safety.