At around 6.30 pm on Friday, the front of an Edinburgh to Inverness train was struck and damaged by a brick or something similar which had been suspended from a rope from the railway bridge near Lady Nina Square. Just half an hour later, a large traffic cone was thrown into the path of an oncoming Edinburgh to Inverurie train. No damage was done.

Then, at around 3pm on Saturday, an Edinburgh to Dyce service struck an object that had been suspended from the same bridge, again causing damage to the front of the train.

British Transport police carried out door-to-door inquiries in the area in an effort to obtain information, but are now looking for help from the public.

Said Sergeant Jim Wands, “Fortunately no one was injured in any of these incidents, although the consequences could have been much worse.

“We are anxious to trace two youngsters who were seen near the bridge around the time on Friday night, and a group in relation to the incident on Saturday, was also seen on the bridge. The group is described as being a mix of adults or teenagers, with some younger members.”

He continued, “The incidents could have had devastating consequences for those involved, as well as the passengers and staff on board the trains.

“I believe the local community may have vital information, and would ask anyone with any knowledge of those involved to contact British Transport Police.

“After all, these incidents could so easily have caused serious injury to a member of your own family.”

British Transport Police can be contacted on 0800 40 50 40, or information can be given anonymously to Crimestoppers on 0800 555 111.