WALES - The Waukesha County Sheriff's Department says it has arrested two teenagers who allegedly were involved in explicit graffiti found at Kettle Moraine High School last week.
Authorities arrested a 19-year-old man from Watertown and a 19-year-old woman from the Village of Summit.
"Their intent was to just spray paint graffiti and tag," said Waukesha County Sheriff's Detective Steve Pederson to TODAY'S TMJ4's Melissa McCrady.
"It was not their intent to convey any type of threatening or violent act directed at anybody in the school or at the school."
"I didn't think anything would happen, but I was scared, what if something did?" said Nicole Anderson, a senior at Kettle Moraine High School.
About half of students left the school early Friday after the threatening graffiti was found spray painted outside the school.
The school remained open and the graffiti had been painted over, though students snapped pictures of it and spread it by social media.
The threat didn't appear to be specific, but it made reference to the school, burning and killing people.
The message included "kill people," "die yuppie scum" and more explicit content.
District officials explained why school remained open Friday, despite the option officials gave parents to remove their kids for the day.
"We believe our building is safe for our students today, as any other day, and we believe the vandalism is an act of graffiti painted on the wall," said Kettle Moraine High School Principal Jeff Walters.
It is believed that outside surveillance cameras helped police nab the teenage suspect.
People found messages spray painted on buildings throughout Waukesha County. Right now, it's unclear if those messages are all connected.