In response to a comment explaining that neither ship was Chinese:
And this is why China needs to stop being gigantic bullies and jerks in those waters. It leads to tensions where even routine stupid collisions in very crowded waters are instantly assumed to be hostile actions. If this had been a Chinese ship that had been struck, the Chinese would have instantly reacted the same way and they would have started howling for blood before the facts were known. Until China dials down the aggression, this area is a powder keg that they have created and sparks are flying every day. Today's mishap was another spark and everybody is lucky that the shooting didn't start. It's up to the Chinese to stop this and dial back the tension.
edit: wow, the China trolls are out for this comment! Sorry, kids. Have a nice afternoon.