A lawyer for the girl's mother said the episode was "incomprehensible".
The video, made public by the lawyer this week, shows the unfolding of the violent tantrum, which started when the little girl refused to take part in a maths lesson.
She then ripped some papers off a bulletin board and started punching whoever tried to calm her down.
After calling her mother and learning she would not be able to pick up the child for at least one more hour, the teachers resorted to calling the police.
Three officers rushed to the scene, and apparently oblivious to the fact they were dealing with a child, handcuffed the screaming girl by pinning her arms behind her back.
They finally drove her to her mother in the back of a police cruiser.
The St Petersburg Police Department declined to comment on the incident and said an investigation was under way.
From BBC ::
There is a link here at the original article for video footage of this.
What makes me even more upset is this AOL poll and the results so far:
Did police behave properly in handcuffing the unruly girl?
Yes 57%
No 43%