Deputies were called to a stabbing at Southwest Community Christian School in the 14800 block of Bellaire Blvd. just before 7am Saturday.
They found a parked car in the parking lot. According to investigators, two men were in the car when they got into an argument. One stabbed the other multiple times.
The victim was transported to a local hospital in critical condition. Authorities said they expect him to survive.
The suspect was taken into custody at the scene.