Seven postal vans have been damaged in Coleraine.
The damage occurred at the New Row depot overnight between 6pm on Wednesday (September 23) and 4am this morning (September 24).
Police are investigating the criminal damage.
Enquiries are continuing and police are appealing to anyone who witnessed anything suspicious in the area to contact police on 101, quoting reference number 222 of 24/09/20.
You can also submit a report online using the non-emergency reporting form via http://www.psni.police.uk/makeareport/.
Alternatively, information can also be provided to the independent charity Crimestoppers on 0800 555 111 which is 100% anonymous and gives people the power to speak up and stop crime.