A childcare centre in the United States is under fire after a deeply disturbing video surfaced.
A television station in St.Louis, USA, has obtained a shocking video taken at the Adventure Learning Centre childcare centre in December 2016.
KTVI-TV aired the footage which shows small boys wearing over-sized green Incredible Hulk fists punching each other, including in the head.
At one point a teacher jumps up and down in apparent excitement.
The only person seen trying to break up the fight is another toddler, who is ignored.
Local police and Missouri state inspectors investigated at the time, but no charges were filed.
Both teachers were fired and the centre was allowed to remain open.
ABC America reported that one of the teachers told investigators the fight was to help kids with "stress release".
Toddler continues to suffer 'mental anguish'.
The video was captured by the 10-year-old brother of one of toddlers.
He sent the video to his mother, who called the centre's director.
The director stopped the fighting and both teachers were fired.
Over 30 minutes of fighting was recorded by the centre's cameras, KTVI reported.
St Louis Circuit Attorney Kim Gardner's office declined to prosecute.
A statement on Wednesday cited poor judgment by the adult supervisors but "insufficient evidence to prove beyond a reasonable doubt that any laws were violated".
