Investigators said they were called to White Oak Middle School in Porter around 4 p.m. after two 13-year-old boys got into a fight behind the school.
At one point, one of the teens allegedly pulled out a knife and stabbed the victim in the abdomen.
Deputies said the victim ran to his home a block away from school to tell his mom what happened. He was taken to Texas Children's Hospital with non-life threatening injuries.
The teen suspect was arrested after officers found him at a nearby store.
He has now been charged with aggravated assault with a deadly weapon.
We do not know why the two boys were fighting. Deputies are continuing their investigation.
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