Officials called it an “isolated incident that only applies to Indian Trail.”
“It was a text message between students that was then posted to Snapchat,” said Tanya Ruder with KUSD.
The Kenosha Police Department is investigating the source of the threat and officers will patrol the school Thursday morning.
Police say a parent contacted authorities after seeing the threat on social media Wednesday at 9:30 p.m.
Parents and students who showed up for school Thursday morning were immediately told to go back home.
"Our kids are not safe if there's someone out there threatening to shoot the school up," said parent Samantha Pohlman.
In a follow-up Facebook post, the district referenced Wisconsin Act 311, a law passed in 2016 making it a felony to make real or false claims regarding shootings, bomb threats or to cause any other bodily harm to others.
Students have been charged under the law, according to the district, adding that “making threats is not a joking matter.”