The whole of Greater Manchester’s tram network has been shut down because of a control room failure.
Control room staff have lost visible sight of trams although drivers remain in radio contact, Transport for Greater Manchester (TfGM) said.
A spokeswoman said the failure, which is not being linked to any cyber-attack, was discovered at about 15:50 BST.
Passengers are being allowed to use their tickets on buses, she added.
“Due to a communication fault, all lines are suspended,” the company said in a statement.
“Ticket acceptance on buses has been arranged. The drivers can still communicate with the control room.”
Without visibility of the trams however, it said its difficulty was “in terms of getting people around” the network.
The firm said that no trams would be running until the issue had been resolved.
In a tweet, Manchester Metrolink said it was “unable to make announcements or update information displays” at tram stops.
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