SPARTA, Wis. — Students at the Sparta Area School District spent about 90 minutes Monday in a classroom hold after a student made a direct threat on social media that included images of weapons, officials confirmed.

“Due to the nature of the threats and the fact that the whereabouts of the individual were unknown, the district and law enforcement cooperatively made the decision to implement a classroom hold in all buildings in the district,” read a statement on the district’s Facebook page.

The student was apprehended by about 9 a.m., officials said. No shots were fired.

“Incidents like the one that occurred this morning are alarming,” the statement continued. “Fortunately, the district and local first responders have been working together diligently to prepare for just such an incident. Responses were appropriate, cooperation was high, and the individual in question was located and removed without harm or injury.”

The incident remains under investigation and the district is declining further comment at this time.