Delays of up to 30 minutes on East Coast between York and Doncaster due to problem at a level crossing.
There is no current estimate for when a normal service will resume. Also affecting CrossCountry.
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At least six people from the region are missing after the terror attack at the Ariana Grande concert in Manchester on Monday.
Northumbria Police will be holding a meeting later following the terror attack in Manchester.
Ariana Grande fans from the North East have told how they were caught up in a terror attack which has killed at least 22 people.