It follows several reports of damage to agricultural vehicles around Balearicard Road, Larne, overnight on Saturday (October 9).
A PSNI spokesman said: “Given the dark nights and the festive season, these types of crimes are on the rise.
“The police will appeal to the owners of valuable equipment and machinery to take effective security measures and appeal to the public to remain vigilant.
“Please report any suspicious activity to the police. We want to prevent you from becoming a victim of crime.”