Rail services between Ipswich and Peterborough were delayed after sheep escaped onto the tracks.
Greater Anglia confirmed on Twitter that the 11.50am service from the Cambridgeshire city would arrive in Suffolk's county town 10 minutes late.
The firm did not reveal where along the route the sheep blocked the train.
For more details of closures, check the latest updates on Greater Anglia's website.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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