Four people were taken to hospital following a car crash on St Albans Road on Friday, January 13 at 10.58 pm.
At around 10.45pm, police officers were in pursuit of a suspect vehicle.
The vehicle was observed by officers being driven dangerously, including on the wrong side of the road and in excess of 100pmh.
Two people from the suspect vehicle were detained and taken to the hospital.
Following a search of the vehicle, a quantity of ammunition was found.
Two occupants of the other vehicle were taken to the hospital; their injuries were later assessed as not life-threatening or life-changing.