By Michael Rosenfield, WBZ-TV

EXETER, N.H. (CBS) — A scandal involving teachers has rocked Exeter High School in New Hampshire.

Two of the teachers have quit, the third is on paid administrative leave for the time being.

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WBZ NewsRadio 1030’s Kim Tunnicliffe reports

The investigation began when a former student recently came forward to report a sexual assault in 2009 involving a teacher.

The assault investigation led to the discovery of an “original screenplay,” according to Superintendent Michael Morgan, who characterized it as “controversial” and said in a statement today, “You may hear more about this matter, which I am not at liberty to discuss at this time.”

Someone sent the manuscript to the New Hampshire Union Leader newspaper, which said it includes sex scenes involving teachers and vulgar language.

The three teachers, now off the job are listed as the authors of the play, called “Graduation Crashers.”

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“It’s disgusting,” said former student Chelsie Goerndt, who graduated in 2010. “They have to keep in mind that just because they’re working with high schoolers doesn’t mean that they’re not children.”

The school district is not releasing names, but documents obtained by WBZ-TV reveal that a social studies teacher resigned at the end of May.

Sources say he is the teacher linked to the alleged sexual assault. WBZ-TV is not releasing his name at this time.

“He was pretty cool, he’s a cool guy,” said student Jordan Dickenson who was a pupil of the teacher. “He’s a good teacher.”

No criminal charges have been filed. Exeter Police say their findings, so far are interesting.

“To this point, yes I would say we’re surprised,” said Exeter Police Captain Stephan Poulin.

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Police are asking students, former students, parents and teachers to come forward with any information they may have.