Police are appealing for information after a man was seen tampering with a train’s controls.
It happened at about 03:20 BST on 27 July at Preston Railway Station, British Transport Police said.
A man entered the driver’s cabin of a stationary train and “began moving the controls, including turning the electricity off on the train and attempting to switch off the brakes”, the force said.
They have released a CCTV image of a man who may have information that could help their investigation and have asked for any witnesses to contact them.