The Royal Deeside Railway suffered a significant act of vandalism late on Monday night.
The incident involved smashed windows on a coach that was being renovated at the West Lodge area, they smashed all but one window on the side, and also the rear window on a locomotive that was supposed to leave the site today to go to Keith & Dufftown Railway in Morayshire.
Membership Secretary for the Royal Deeside Railway, David Pearson, said: “We’re all very disappointed and very annoyed.
“We’ve had a small bit of vandalism in the past, but nothing serious.
“This is our most serious incident.”
Pearson said that the cost of each window was between £1,000 and £1,500, and estimated the total cost of damages to be around £10,000 to £15,000.
He said: “The problem is sourcing the parts that have been damaged.
“These are coaches that are no longer in production, they date from the late 50s to the early 60s, and these are the coaches that we use every day. One of the ones that’ve been damaged is one that we purchased from Newcastle last year.”
What is thought to be a group of teenagers were spotted by the Laird’s Ghillie late on Monday night, but they ran away.
Anyone with information should contact the Royal Deeside Railway through their Facebook page, or contact Police Scotland on 101.