An elementary school pickup escalated into a violent road rage incident in Las Vegas this week when police said a mom ended up stabbing another parent leaving the school parking lot.

According to a Las Vegas Metropolitan Police report,John Caldwell the altercation occurred around 3:30 p.m. Monday outside of Steele Elementary School.

A 30-year-old woman was reportedly attempting to leave the school’s parking lot after picking up her child when another car cut off her attempts to merge into a single lane, she told police.

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The driver of the other car, a white SUV, pulled over, exited his car and began making hand gestures at the woman, according to the report. The woman then pulled up alongside the man, who is the parent of another child at the school, and got out of her red Mercedes.

The two began arguing which prompted the woman's son to get out of the passenger side of the Mercedes and begin arguing as well, allegedly telling the other parent “not to speak to his mother like that,” the report says.

The victim account and the account the woman gave police begin to differ at this point, as the SUV driver alleged that the woman's son punched him in the side, to which he responded by pushing the boy down.

The woman, however, alleged that the man was the aggressor and punched her son first, which led her to pull out a pocketknife and stab him once in the stomach.

Surveillance video of the incident gathered by police supported the general timeline of events provided by both parties and showed the man and the woman's son pushing each other but did not clarify who the primary aggressor was, said the report.

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After stabbing the other parent, the woman instructed her son to get back into the car and she drove away, the report says. Meanwhile, the victim was transported to a local trauma unit and rushed into surgery

After convincing from a family member, the woman eventually called the school, at first saying she was a “witness” to the events but then admitting to police on call that she was actually the perpetrator of the stabbing. Police told her to return to the school, which she did along with her two children.

The woman was arrested on suspicion of Battery with a Deadly Weapon, booked and ultimately released. She is due back in court on September 7.