A £1,000 reward is being offered to help catch the person who threw a shopping trolley into the path of a high-speed commuter train in Hertfordshire.
It was thrown off the bridge at Digswell Rise in Welwyn Garden City last month.
The Cambridge to King's Cross service was travelling at 100mph when it was hit.
British Transport Police say they are amazed the train did not derail.
It happened just after 6pm on Tuesday February 10. The driver of the 5.17pm train was forced to make an emergency stop.
British Transport Police have released an image of a man they would like to talk to after a bike was stolen at Peterborough station.
Anyone with information about the man's identity is asked to contact British Transport Police on 0800 40 50 40 or call Crimestoppers on 0800 555 111
Detectives investigating an attempt to steal money from a cash machine in Hertfordshire have released a CCTV of a man they would like to question.
Six men attempted to use an angle grinder to break into an ATM at Knebworth station but were disturbed by a member of the public.
Two of the men were wearing high-vis jackets in a apparent attempt to pose as railway engineering staff
A photograph has been released by British Transport Police of a man they want to question after a ticket inspector was verbally abused and assaulted on a train from Peterborough to King's Cross.
Anyone with information is asked to contact BTP on 0800 40 50 40 or Crimestoppers on 0800 555 111
The number of cable thefts on Anglia's rail network has started to fall. Since January there have been just two attacks on our region's railways - a big decrease compared to July when there was a high of 26 thefts in one month.
Network Rail and British Transport Police say the success in tackling the crimes is due to a new task force and a change in legislation.