Leave and get help.

• What are you going to do against a person with a gun even if someone's been shot?
• There's a very good chance the person or animal targeted is already dead and it's too late.
• If you move toward a gunshot sound, and visibility isn't perfect (say you're going through the bushes) you may be shot because you're mistaken for a wild animal or enemy.

The last thing you'd want to do is rush over and see what happened or get involved in a conflict when you have no idea how it started or who is telling the truth.