Shocking moment 'transgender' student drags much smaller girl out of upstate NY school bathroom by hair during brawl, with clip prompting bomb threat that closed school

Shocking video showing a 'transgender' student attacking another girl in a women's restroom resulted in a bomb threat being sent to the school after the clip went viral.

The assault at Greece Arcadia high school took place in February and saw the victim dragged out of a stall by her hair by a much larger attacker, described as transgender.

Footage of the attack was shared by feminist website Reduxx on Thursday and resulted in a bomb threat being sent to the school, forcing it to close on Friday.

Greece Central School District Superintendent Kathleen Graupman said the anonymous threat qualifies as a 'hate crime' as she slammed those using the video to further 'hateful' agendas.

The clip in question shows a student barge into a restroom stall and begin beating a girl inside while other pupils film on their phones.

The student grabs the screaming girl by her hair and drags her out  along the floor and into the hallway.

The student throws several more punches before a member of staff comes running over to separate them.

Even as they are dragged away, the assailant refuses to let go of the girl's hair.

Eventually the student is escorted away and the girl who was attacked runs up behind and attempts to fight back.

However, she is picked up and carried away by what appears to be another staff member. 

In the wake of the footage going viral on Thursday, the school was sent a bomb threat at 6.07am on Friday.

Several bus loads of students who had already arrived on campus had to be redirected as cops worked to investigate.

The threat accused the school of failing to make a safe learning environment and accused the district of encouraging 'mentally ill' and 'degenerate', making reference to the fight, NBC News10 reports.

'They created a situation that allowed for a girl to be assaulted in a women's restroom by a worthless degenerate sack of mentally ill who thinks he's a girl,' the threat said.

'We're here to send a message, we placed a bomb in the school, evacuate now.' 

There has been no confirmation from official sources about any of the students' gender identity. 

However, Reduxx stated it had spoken to another student at the school who claimed the attacker is transgender. 

'It is clear that this is being used for an agenda, whether it's a personal or political agenda, it is being used,' Graupman said.

'That fight that occurred was significant and very, very upsetting and disturbing, and also I want to be very clear it involved minors, it involved minors that deserve respect and privacy. 

'We don't get to share videos and names and peoples personal identities out there.'

Graupman did not say what measures had been taken to discipline the attacking student in the wake of the fight.  

The police eventually deemed that the threat was not credible and the school reopened after 9am.

New York is among states whose laws let transgender people use whichever bathroom aligns with their gender identity.

Supporters of the law say it helps enshrine the dignity of trans people, who are often vulnerable to abuse and attacks.

Detractors say it can threaten women's safety, by allowing men who decide to self-identify as transgender to access female-only spaces.