St Albans Abbey Station. Photo: Danny Loo. (Image: Archant)
Anyone hoping to take the Abbey Line from St Albans Abbey to Watford Junction will have to catch the bus instead as the train has broken down.
Travellers will be pointed to Arriva service 321 for the rest of the day.
To follow the incident on Twitter, use #StAlbansAbbey.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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