Two people were taken to hospital following a two-vehicle collision in the Moorfields Road area of Ballymena on Sunday, March 26.
Four other people were taken to hospital for treatment to injuries which are not believed to be life-threatening at this time.
The crash happened near the Wardlow Road/Rankinstown Road junction around 5.55pm and involved a Toyota Auris and a Vauxhall Insignia.
Inspector McKenna is appealing for information.
“Our enquiries are ongoing and I would ask anyone who was in the area at the time and saw anything, or who may have dash cam, CCTV or other footage, to contact police on 101 quoting reference 1313 of 26/3/23.
Alternatively, you can submit a report online using the non-emergency reporting form via http://www.psni.police.uk/makeareport/.
You can also contact Crimestoppers anonymously on 0800 555 111 or online at http://crimestoppers-uk.org/.