Glasgow Central and Edinburgh Waverley railway stations have been affected by a cyber security incident.
Public Wi-Fi at the city centre train stations has been hacked with users trying to access the network being met with a webpage titled "We love you, Europe" followed by information about terror incidents.
It is understood that of the 20 stations managed by Network Rail, 19 are affected.
The issue first arose at around 5pm on Wednesday evening and it has been confirmed that the Wi-Fi is still down as of 8am on Thursday morning.
An investigation into the incident is underway by British Transport Police.
A Network Rail spokesperson, said: “We are currently dealing with a cyber security incident affecting the public Wi-Fi at Network Rail’s managed stations.
"This service is provided via a third party and has been suspended while an investigation is underway."
Telent is the Wi-Fi provider for the stations. It confirmed that it is aware of the investigation.
A spokesperson for Telent said: "We are aware of the cyber security incident affecting the public Wi-Fi at Network Rail’s managed stations and are investigating with Network Rail and other stakeholders.
"We have been informed there is an ongoing investigation by the British Transport Police into this incident, so it would not be appropriate to comment further at this stage."
A British Transport Police spokesperson said: “We received reports at around 5.03pm yesterday (September 25) of a cyber-attack displaying Islamophobic messaging on some Network Rail Wi-Fi services.
"We are working alongside Network Rail to investigate the incident at pace."
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