Police are investigating vandalism at a McLaren Vale winery this week.

Between 8am Sunday 2 and 5pm Monday 3 June, cement was poured into an inlet pipe preventing water from being drawn from a river to a dam on a winery on Malpas Road, Willunga.  This has resulted in significant damage to the infrastructure.

Police would like to speak to anyone with knowledge of this incident, or who saw any suspicious activity in the vicinity of Norman Road, Little Road and Malpas Road on Sunday or Monday.

Anyone with information, CCTV or dashcam footage that may assist the investigation is asked to contact Crime Stoppers on 1800 333 000 or online at Crimestoppers.