Last updateWed, 01 Oct 2014 1pm

2 postal workers dead in shooting - CNN (video)

Police say two female postal workers have been shot and killed in a Tennessee post office shooting.

One possible hidden cause in some cases for people going "berserk" or becoming enraged is psychological harassment or criminal psychological harassment.

- Provocation can quickly lead to anger or the fight-or-flight syndrome.
- Humiliation can lead to rage. (rage shootings)