Passengers on the Metro system are facing delays this morning.
The service has been affected by a track fault and also a cable theft.
Bosses say there are delays of up to 10 minutes between South Hylton in Sunderland and the Newcastle Airport station.
The service tweeted: "We currently have delays of approx. 10 minutes to some services between Airport and South Hylton in both directions, due to a track fault at Bank Foot and cable theft.
"We are running a good service with no reported issues between South Shields and St James in both directions."