Delays of up to 30 minutes on Northern Rail between Newcastle and Middlesbrough, and between Newcastle and MetroCentre due to overhead line problems at Newcastle.
Disruption is expected until around 18:00.
Also affecting East Coast, CrossCountry and First TransPennine Express services.
More top news
A look ahead at the forecast for the Tyne Tees region
A family from Sunderland have been chosen to have their home replicated at Beamish Museum as part of a new '1950s Town' display.
Despite a significant rise in the number of historical sexual assaults being recorded, Durham Police's recorded crime has remained level.