Seven middle school students from Ohio have been charged with serving their teachers crepes tainted with either urine or semen.

Delaware County prosecutors filed criminal counts on Tuesday against six 14-year-olds and one 15-year-old attending eighth grade at Olentangy Hyatts Middle School following a four-month investigation into the stomach-turning allegations.

The incident took place back in May, when the students had prepared food as part of an end-of-the-year cooking competition where their teachers acted as judges.

'One student filmed some of it, and the video made its way around the school and fortunately to school administrators,' said Tracy Whited, Delaware County Sheriff’s Office spokeswoman.

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Seven male eighth-graders at Olentangy Hyatts Middle School in Ohio have been charged with adding bodily fluids, including semen and urine, to crepes that were served to teachers

Three of the teens on Tuesday were charged with assault and the other four with complicity to assault for failing to stop the sickening prank in May

The video allegedly showed the suspects’ bodily fluids being added to the crepes.

The sickening footage was not uncovered until after the contaminated crepes were consumed by two unsuspecting teachers: a 24-year-old woman and a 49-year-old man.

During the investigation that followed, deputies seized a clear plastic baggie containing 'off white liquid substance' and three iPhones.

One student was charged with felony assault for allegedly bringing his semen to school and pouring it onto a crepe that was then served to a teacher, reported WBNS.

According to court documents, the teen planned the foul stunt days earlier with his classmates.

A second student was charged with complicity to assault for allegedly taking part in the plot and doing nothing to stop it.

He also faces an additional charge of tampering with evidence for allegedly deleting text messages and video from his phone in a suspected cover-up attempt.

A female teacher and a male teacher at the school ate crepe tainted with a student's semen while judging a cooking competition at school (stock image)

A third student was charged with assault for allegedly bringing his own semen to school, even though he ended up not adding it to the crepe.

A fourth student was charged with assault for allegedly adding urine to a barbecue sauce and pouring it onto crepes that were then served to four teachers.

The other three students were each charged with complicity to assault a teacher.

All seven cases will be handled in juvenile court, where the underage suspects are due to appear in the next three weeks.

Olentangy Local School District issued a statement addressing the incident: ‘we are saddened that these charges are a result of actions that took place at one of our schools. Our teachers deserve respect and kindness, and anything less than that is completely unacceptable. We will continue to support law enforcement in every way possible.’

The students’ defense attorney, Brad Koffel, told The Columbus Dispatch that his clients come from 'very good families,' and blamed their antics on social media culture and the teenagers' desire to gain notoriety through 'clicks' on YouTube.

The lawyer said the teens have expressed remorse for their actions and have been reprimanded at home for what he characterized as the boys 'dumb actions.'