12//13/14 years and up is a good minimum age of watching.
A man is murdered by a mob. His body later appears, re-animated and crawling with insects, then falls to pieces.
A man is stabbed repeatedly in the back with hedgeclippers. Not too much blood is seen, but it's still violent.
A man attempts to kill himself by stabbing himself in the throat with a piece of wood. Not graphic.
A woman is attacked with an axe. Her arm is cut off, and she instantly regrows a new one; when her head is cut off, she picks it up and puts it back in place.
The zombie/demons have bloody, deformed grisly faces.