Police are hunting for the culprits after a high-speed train struck a lorry tyre that was deliberately placed on the mainline.
The collision took place at about 1.20pm on Sunday when the First Great Western train travelling towards Penzance struck the large tyre on the tracks between Menheniot and Liskeard.
DC Dave Bailey, investigating officer from the British Transport Police, said: “The driver of First Great Western’s 0857hrs London Paddington to Penzance service reported striking the lorry tyre which was on the line. He brought the train to a halt and, although the train suffered some damage, he was able to continue after a delay of around 30 minutes.
“Thankfully no-one was injured, but this could have resulted in a much more serious incident. Placing objects on the railway line is an extremely dangerous act and could result in serious consequences.
“It is only through good fortune that no-one was harmed and it is vital that we trace whoever is responsible for this foolish act.”
Anyone with information is asked to call British Transport Police on 0800 40 50 40 or the independent charity Crimestoppers, anonymously, on 0800 555 111. In all calls please quote incident reference 234 of 22/12/13.