British Transport Police officers are appealing for information after a brick was hurled at a train windscreen as the vehicle approached Goldthorpe station.
Three youths were seen standing on the station bridge, one of whom threw the brick at the train.
PC Sandra Murray, the investigating officer said: “The 15:25 Plymouth to Leeds service was approaching Goldthorpe station around 6.30pm on July 29 when a brick was thrown at the windscreen from a bridge.
“The windscreen was damaged as a result, but fortunately neither the driver or passengers were injured.”
Police are keen to find those responsible as officers are concerned that they do not realise the dangers of throwing objects at moving trains.
Officers want to trace three boys seen standing on the station bridge at the time, aged between 13 and 15, one of whom was wearing a red chequered top.
Emphasising the seriousness of such acts, PC Murray added: “Fortunately on this occasion, no one was injured as a result, however the consequences could have been far worse.
“This was an extremely foolish and dangerous act, which put the driver and passengers on the train in danger.
“Patrols have now been stepped up in the area to catch and deter any vandals from carrying out this type of extremely dangerous crime.
“If anyone knows who is responsible, or saw anything suspicious in the area at the time, then I would urge you to get in touch.”
Anyone with information is asked to contact British Transport Police by calling 0800 40 50 40 or texting 61016 quoting B8/NEA of 06/08/2013
Alternatively, information can be passed to the independent charity, Crimestoppers, anonymously on 0800 555 111.