Police are investigating after a sign on the roadside outside Priory Farm Shop, New Hedges, was smashed beyond repair sometime between 7 pm on Sunday and 7 am the following morning.
Officers are keen to speak with anyone who attended a party at the Retreat public house on Sunday evening.
Anyone with information is asked to contact PC1045 Alex Jones at Tenby Police Station on 0845 330 2000 or Crimestoppers on 0800 555 111.