Three V/Line carriages have been vandilised at Warrnambool Railway Station over the weekend.
Warrnambool Police Leading Senior Constable Brooke Pollock said the carriages, located near the platform, were covered in tags and colourful graffiti some time late Friday night and early Saturday morning.
Leading Senior Constable Pollock said police were expecting to access CCTV footage of the area on Monday.
Leading Senior Constable Pollock said the incident was unrelated to a fire at a nearby heritage-listed house on Sunday.
Anyone with information is urged to contact Warrnambool Police Station or Crime Stoppers on 1800 333 000.