Police were called to reports of a casualty on the tracks at Broxbourne station in Hertfordshire this morning (August 20) just before 6.40am.
At the scene, a person was pronounced dead.
The incident is not thought to be suspicious and a file will be prepared for the coroner.
Greater Anglia and Stansted Express services were impacted between Cambridge, Stansted Airport, Hertford East and London near Liverpool Street.
All lines were closed between Bishop Stortford and Broxbourne for nearly three hours.
Now these train services are slowly returning to normal, but some disruption is expected to last until noon.
A British Transport Police spokesperson said: “Officers were called to a report of a casualty on the tracks just before 6.40am this morning (August 20) at Broxbourne railway station.
“Officers and paramedics attended and sadly a person was pronounced deceased. The incident is not thought to be suspicious and a file will be prepared for the coroner.”
If you feel affected by what has happened and wish to find support, you can contact the Samaritans on 116 123 via phone for a confidential chat or email jo@samaritans.org.