Coleraine police are investigating criminal damage and attempted theft from a Royal Mail van.
It happened in the Pates Lane area around 10.30 on Saturday morning.
Two teenagers in blue and grey hoodies are believed to have smashed the driver's window.
They failed to force open the rear doors but extensively damaged the vehicle.
Anyone with information is asked to please contact Coleraine PSNI on 101.
Social media warning ahead of inquest into death of Noah Donohoe
Former senior police officer Jon Burrows confirms UUP leadership bid
Man’s body found in Cookstown in search for missing 21-year-old
Two taken to hospital following suspected gas explosion in east Belfast
Man critically ill in hospital following road crash in Co Tyrone n