A person was hit by a train between Gidea Park and Chadwell Heath last night.
The British Transport Police (BTP) were called to Romford Station at around 7.20pm to reports of a casualty on the tracks.
A BTP spokesman said: "Officers attended but sadly a person was pronounced dead at the scene.
"The incident is not being treated as suspicious."
Passengers travelling between Shenfield and Stratford were affected by delays and cancellations until all lines were reopened at 1am.
At the time, a spokesman for Greater Anglia tweeted: "Due to a person being hit by a train between Gidea Park and Chadwell Heath all lines are blocked.
"Train services running through these stations may be cancelled, delayed or revised. Disruption is expected until further notice."
Greater Anglia also urged anyone affected by the incident to contact Samaritans by calling 116 123 for free.
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