A motorcyclist in his 30s is in a critical condition following a two vehicle collision near Ballyclare.
It happened on the Templepatrick Road at around 4:35pm on Sunday.
A car and a motorbike were involved in the incident.
The motorcyclist was taken to hospital and remains in a critical condition.
The Templepatrick Road in Ballyclare has reopened and officers would appeal to anyone with any information or who may have dash-cam footage available to contact them on 101, quoting reference number 1360 07/05/23.