An unnerving Facebook post allegedly made by a Wisconsin elementary school teacher may ultimately cost the fifth grade teacher her job.

“I’d like to go on a short, but effective, killing spree. My children* are INSANE!” the post read, according to WITI-TV.

The asterisk allegedly made by the unidentified teacher notes she is referring to children at “school and home.”

A fifth grade teacher may lose her job after allegedly crafting a "killing spree" Facebook post. (Image source: WITI-TV_

A fifth grade teacher may lose her job after allegedly crafting a “killing spree” Facebook post. (Image source: WITI-TV)

The Williams Bay Elementary School teacher at the center of the controversy has been out of the classroom last week, WITI reported. Further, superintendent Wayne Anderson confirmed to the local Fox affiliate that an investigation is underway, but would not say whether the teacher had resigned.

“Once you put it out there, you can never put it back,” former substitute teacher Ellen O’Malley told WITI. “To actually be so immature to put it online — like that is a grave mistake.”

Follow Oliver Darcy (@oliverdarcy) on Twitter