A man in his 60s has died following a two-vehicle collision at the junction of Belfast Road and Wallace Avenue in Lisburn.
The man was the driver of one of the vehicles involved. The incident happened at around 3pm on Monday.
Wallace Avenue and the Belfast Road area remains closed to traffic. Diversions are in place.
Inspector Jim McGrillen said: "I would ask anyone who witnessed the collision to contact Lisburn Police Station or the Collision Investigation Unit on the non-emergency number 101."