Five vans have been damaged or broken into at Dunsilly Roundabout 'Park and Ride' near Antrim.
Police say a number of valuable items have been taken.
The incident is believed to have happened yesterday daytime.
Anyone with information is asked to contact the detectives at Antrim PSNI station on 101.
Call for tougher firearm checks to tackle violence against women in NI
Hilary Benn defends £50 million NI defence deal after Michelle O’Neill criticism
NI ‘probably’ worst in western Europe for cancer wait times – committee chairman
Police restraint did not lead to death of man, coroner finds
Man who stole Noah Donohoe rucksack says he ‘never met or saw’ schoolboy