There were no trains running in or out of Norwich this morning (Image: Brittany Woodman)
Rail passengers were warned of delays after all services in and out of Norwich were blocked this morning.
Greater Anglia said the severe disruption was due to a fault with the signalling system.
A spokesman for the firm said they were working "diligently" with Network Rail to restore the timetable "as soon as possible".
READ MORE: Green light for Norwich Main Substation expansion plans
A "very limited" number of rail replacement buses were operating between Norwich and affected routes and passengers were told tickets would be accepted on local bus routes between Norwich and Sheringham, Great Yarmouth and Lowestoft.
The lines reopened just after 7am but delays and disruptions continued until around 10am.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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