At least 11 cows have died after they wandered onto railway tracks and were struck by a train carrying Arsenal fans to Burnley.
The 9.38am service from Kings Cross to Sunderland reportedly killed eleven cows crossing the track between London and Peterborough, blocking lines and disrupting services running north from the capital.
The incident has caused chaos for passengers, with all services passing through the area delayed or cancelled as a result of the crash.
The train eventually turned back towards London.
In a statement Grand Central confirmed: "Due to animals on the railway between Peterborough and London Kings Cross all lines are blocked.
"Train services to and from these stations may be subject to disruption on all routes. Disruption is expected until 14:00."
