A student stabbed another student at Thurman White Middle School, according to Henderson police.
Friday was the fifth day of school.
Police responded to the call about 9:30 a.m.
No further information from police has been provided.
Thurman White Principal Andrea Katona said a student from another school entered the campus and confronted a Thurman White student in the Quad area.
Staff members intervened and one student was transported for medical attention while the other was taken into custody.
CCSD said the incident happened before the bell rang in the morning.
The school serves about 1,600 students.