Authorities say one student was killed and three others were injured in Wednesday morning's stabbings at spring high school, north of Houston.
Three students are being held for questioning in connection with the incident.
The Harris County Sheriff says the student who died was 17 years old.
There's no word yet on who was responsible or a possible motive.
Hundreds of Alumni marched alongside band director Steve Connell for his last parade in the Tulip Festival.
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