A YOUNG female teacher in the United States is behind bars accused of having sex with three students.

Erin McAuliffe, 25, was arrested after colleagues and students were interviewed in a month-long police probe.

The investigation was launched after admin staff at her school tipped off cops about alleged misconduct involving the maths tutor.

All the reported romps with the three boys — two 17, one 16 — took place away from school, police said.

McAuliffe has been charged with three counts of sexual activity with a student and one of indecent liberties with a minor.

She has been sacked from Rocky Mount Preparatory, North Carolina, where she had worked since last August.

Her bosses said: “We have been fully cooperative with local law enforcement during the course of their handling of this matter.”

McAuliffe is being held at Carteret County Jail after she was taken into custody on Thursday in the US.

She is due in court on Monday.

Rocky Mount Prep says Erin McAuliffe's employment ended May 4. Police say school contacted them the next day about the possible impropriety. pic.twitter.com/XWKcRpgyEl — Robert Richardson (@RobertReport) June 9, 2017

The Rocky Mount job was the first time McAuliffe worked as a teacher full-time, according to her Linkedin profile.

She also offered “after-school tutoring to help struggling students improve their critical thinking and problem-solving skills.”

McAuliffe also worked to “develop alternate enrichment activities and modifications in student programs to increase student understanding.”

This article originally appeared on The Sun.