A track circuit failure has led to delays for trains travelling between Halesworth and Beccles.
Services are delayed by around 45 minutes because of the issue which has meant a back-up operating procedure has had to be implemented.
This means trains are running at reduced speed as a safety precaution.
Greater Anglia has said normal service may not resume until around 7pm.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here