Police are trying to trace an offender after a stone was thrown at a train, smashing a window.
Officers are asking if anyone in the area of Retford station on Thursday, June 2, 4.50om can help with enquiries.
British Transport Police said: "Officers are appealing for anyone who may have any information after a stone was thrown at a passenger train, damaging a window."
Repairing the shattered glass and window is estimated to cost somewhere between £1,500 and £2,000 to repair.
The damaged train was the Virgin Trains East Coast 4.02pm York to Kings Cross service.
PC Kevin Challinor, investigating, said: “The service was hit by the stone as it approached the A6182 bridge in Doncaster coming from the industrial estate road. The stone smashed the outer skin of the window which resulted in the driver having to travel at a reduced speed, causing disruption and delays across the network.
“Fortunately on this occasion no one was injured, but the consequences could have been much worse.
“This was an extremely dangerous act which put the driver and passengers on the train in danger. We need the public’s help to trace those responsible. If you have any information please contact us."
If you have any information which could help the investigation, please contact BTP on 0800 405040 or text 61016, quoting reference 240 of 13/6. Information can also be passed anonymously to independent charity Crimestoppers on 0800 555 111.