British Transport Police say a train could have been derailed after someone placed a road signs on the track in Devon.
The train hit the road signs in Yeoford and BTP officers are now investigating the incident as well as issuing a warning to anyone thinking of placing objects on the tracks.
The incident happened at approximately 6.15am on Monday 15 May as the 5.50am Great Western Railway service between Exeter St Davids and Barnstaple passed through Yeoford.
As the train went around a bend, the driver noticed the signs on the tracks but was unable to stop in time and the train struck them. It is believed the signs were placed on the tracks between 1.30am and 6.15am the same morning.
Detectives say that this is not the first time they have seen road signs being placed on the tracks, and they are convinced that someone knows who is responsible.
Similar incidents took place in 2015 near Newton St Cyres in Devon, which were believed to be deliberate acts.
Police are asking anyone who may have seen a vehicle or a person acting suspiciously around Yeoford between 11pm and 6am or who knows where the signs may have been taken from to get in touch.
- Send a text to 61016 or call 0800 40 50 40 quoting reference 39 of 15/05/2017.
- Alternatively, call Crimestoppers anonymously on 0800 555 111.