A high school basketball game took an unexpected turn when a referee threw a punch at a coach following a heated argument, leading to the referee’s arrest.

The incident occurred during a fall league contest between Arlington and Oak Hills at Santiago High School in Corona, California on Saturday, Oct. 21.

Witnesses claim that Oak Hills head coach Rob Alexander became upset with referee Brandon Knapper over his officiating, which led to an argument.

In a video obtained of the game, 26-year-old Knapper, a former college basketball player, approached Alexander and exchanged a few words before throwing a punch at the coach’s face.

Knapper continued to land more punches on Alexander as he fell to the court, before other players and attendees intervened.

Law enforcement responded to the scene and Alexander was taken to the hospital. The game was halted.

According to law enforcement, Alexander requested prosecution against Knapper, who turned himself in. Knapper was charged with battery causing serious bodily injury and assault by means likely to produce great bodily injury, both felonies.

Knapper was booked in the Riverside County Sheriff’s Department jail and his bail was set at $25,000. He was released on Wednesday.

The Oak Hills’ Hesperia Unified School District released a statement condemning Knapper’s actions as “senseless and shameful.”

“The District is thankful for the swift and decisive action taken by the event promoters and local law enforcement. We are also happy to report that Coach Alexander is in good spirits and looking forward to returning to coaching and teaching as soon as possible.”

Knapper is scheduled to appear in court on Nov. 3.