Three other students were wounded in the incident that occurred just as Spring High School opened at 7 a.m. local time. Police said the three victims were doing well after being treated at local hospitals.
According to witnesses, the stabbings occurred during a gang fight inside or near the student cafeteria. Three teens were initially taken into custody as suspects but two of them are now considered witnesses to the stabbings.
Luis Alonzo Alfaro, who supposedly confessed to killing the unidentified victim, was charged with murder, according to the Harris County Sheriff's Office.
The school, which has 3,000 students, will be closed for the rest of the week.
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