Police have launched an investigation after a ‘malicious’ object was placed on the track near Netherfield Station and is believed to be connected to a pro-Brexit protest.
The device was discovered at the station on March 27.
The BBC has reported that notes were attached to the device saying “leave means leave”, with another saying it would “bring Britain to a standstill”.
Network Rail said the device on the rail track was only intended to cause disruption to railway services.
A spokesman said: “The items failed to disrupt services as intended. Detectives are now working closely with the rail industry to investigate these incidents.
A similar device was also discovered on the railway near Yaxley, Cambridgeshire on March 21.
ACC Sean O’Callaghan from British Transport Police, said: “This was a serious and deliberate attempt by someone to cause significant sabotage and disruption to Britain’s rail network.
“We are urgently investigating the circumstances behind both incidents and are working extremely closely with our national partners, including the rail industry.
“It is important to highlight that these acts were intended only to delay services and not cause damage to the infrastructure, however this failed on both occasions.
“The railway has a number of substantial safeguards in place to prevent and detect this type of sabotage and we are now working tirelessly to identify those responsible.
He added: “We’re are currently keeping an open mind on why someone would put their life at risk to place these items on a live railway, however our early assessment has led us to believe it relates to Britain’s exit from the European Union.
“We’ll continue to monitor this situation extremely closely and have circulated advice to rail operators and indeed Network Rail.
Anyone with information should contact British Transport Police by sending a text to 61016 or by calling 0800 40 50 40.”