At least three people are thought to have been wounded after a shooting at a high school prom.

It is not known if anyone was killed in the shooting, which happened at Antigo High School, Wisconsin, and gunman is reported to be in custody.

According to local media, Langlade Co. Sheriff officials confirmed the incident took place just after 11pm and the Aspirus Langlade Hospital said it had treated at least three people.

A press release handed out to local journalists from Antigo Police Chief said the “shooter is in custody and all three parties were transported to the hospital".

It added: “Officers were in the parking lot patrolling the activities and heard the shots and an officer immediately fired upon the shooters, stopping the threat.”