iWitness video from a student at Dekaney High School shows part of what happened.
Around lunchtime, two students got into a fight in the upstairs hallway. That's when students downstairs gathered to watch the fight.
When they didn't listen to orders by the campus police to keep moving, an officer sprayed pepper spray in the air and the students dispersed.
No injuries were reported and the two students who were fighting have been disciplined.