A juvenile has admitted writing threats on a bathroom stall of Eau Claire Memorial High School, Eau Claire Police said Thursday.

The threats on Wednesday led Memorial officials to evacuate students and shorten the school day.

The juvenile is being referred to Eau Claire County Juvenile Intake under a section of Wisconsin law covering making a bomb scare and what’s considered to be a terrorist threat.

The incident started at 9:30 a.m. Wednesday after the school reported the threats which included: “Get your students out B4 I kill them,” “If you don’t they will die!”, “I have a bomb and loaded gun,” and “I’m hiding somewhere. You have until lunch to get them out.”

The Eau Claire School District decided to do a controlled evacuation of staff and students, and were helped doing that by several members of the police department.

After the evacuation, the department called in five bomb detection dogs from area law enforcement agencies. No signs of explosives or firearms were found in a search.

Police talked with several students and faculty members and reviewed video footage. A suspect was identified and interviewed.

The police department received help from the La Crosse Police Department, the Wisconsin State Patrol, the Minneapolis-St. Paul (Minnesota) Airport Police Department and the U.S. Bureau of the Alcohol, Tobacco, Firearms and Explosives.

“Their assistance with providing bomb detection dogs helped ensure a safe building within a very timely manner,” Eau Claire Police said.