There are severe delays to rail travel between East Anglia and London after a scaffolding pole was thrown onto the tracks.
According to Greater Anglia, a scaffold pole was thrown over a bridge on to the railway lines near Liverpool Street in the early hours of Thursday morning, causing significant damage to some signal equipment.
As a result, train services from London to Colchester have been delayed by 50 minutes - affecting the main route into the capital from Norwich that passes through Suffolk and Ipswich.
This delay comes on the second day of rail strikes across the country with a reduced amount of services running.
Greater Anglia also said that a Network Rail response team is on the scene and assessing the damage.
The rail company apologised to anyone whose journey has been affected by this incident.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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