A 14-year-old Urbana High School student was arrested after police investigated an online post that threatened to shoot people at the school, Urbana police said. The threat was shared with local authorities by the FBI, prompting an investigation and the identification of the student police believed was responsible. The student was arrested and initially charged with making a terroristic threat. Police kept an increased presence at Urbana High School Thursday morning as a precaution while the case was being investigated. Urbana School District 116 worked with police during the inquiry. The student is being held at the Champaign County Juvenile Detention Center. The investigation is ongoing, and police are asking anyone with information to contact Urbana police or Crime Stoppers of Champaign County with an anonymous tip.