An Abellio Greater Anglia train. Picture: ANTONY KELLY (Image: Archant Norfolk 2015)
The Norwich to London train line is being affected by an incident between Chelmsford and Colchester.
Emergency services are at the scene.
People travelling from Norwich to London Liverpool Street are being urged to take services via Cambridge.
Abellio Greater Anglia posted on their Twitter account: 'good service runs on other routes'.
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