Roads were barricaded, police say the scene was not safe and neighbors were confused and worried. They said a male student had a gun and started shooting in the cafeteria.
There were reports one student, who was shot, was taken to the hospital and is in stable condition.
When police arrived, they were told a teacher tackled the student, stopping him from shooting anyone else. No names are being released.
Eventually, more than 100 officers were on the scene.
Superintendent Larry Lilly says, "We appreciate the quick response of school staff and first responders. Most important, we offer our thoughts and prayers to the injured students and all who were affected by this tragedy."
When this happened, students were bused to Riddle Elementary School.
UPDATE: Mattoon High School officials have confirmed an active shooter situation took place at the central Illinois high school Wednesday.
The shots were fired around 11:30 a.m. in the school's cafeteria, where one student was hit. The suspect was subdued and disarmed by school resource officers. The severity of the student's injuries has not been released.
Counseling to students will be provided as necessary.
Authorities are investigating a shooting at Mattoon High School. It happened just before noon Wednesday in the school's cafeteria, according to Champaign/Springfield affiliate WCIA-TV.
There are reports that one person was hurt and another is in custody. All other students were evacuated to nearby Riddle Elementary School.
Police say everything is under control now, and no other information is available at this time.
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