Rockingham Police are investigating damage to a large number of cars at the Rockingham Train Station carpark about 11am on Tuesday.
Ten people reported to police that their cars were damaged.
Police believe more than 20 cars were damaged in the incident.
Rockingham Police are asking for anyone who had their car damaged during this incident to call police on 131 444.
If you witnessed anything suspicious in the area at the time you’re urged to contact Crime Stoppers on 1800 333 000