An investigation has begun at the scene of an earlier RTC on The Frosses Road.
The collision occurred on the A26 road between Ballymoney and Coleraine.
A section of the road remains closed with diversions in place.
UPDATE: The Frosses Road between Ballymoney and Coleraine has reopened following a road traffic collision.
The collision was reported shortly before 9.00 am this morning.
Police attended the scene along with other emergency services.
One man was taken to hospital for treatment of his injuries and is in a serious condition.
Inspector McCafferty is appealing to anyone who witnessed the collision, or who may have captured the dash cam footage, to contact them on 101 quoting reference number 345 of 22/07/20.