The incident began at around 3 pm today on North Circular Road,.
The PSNI say it involved a large number of people.
Three people were rushed Craigavon Area Hospital with lacerations.
None are believed to be in a life threatening condition.
Three ambulance crews, one Rapid Response Vehicle, one paramedic officer and one doctor were dispatched to the scene.
The Air Ambulance was also in attendance.
The police said their enquiries are at a very early stage.