Police requested the Liverpool Street to Shenfield line be closed this evening so they could apprehend a suspect at Seven Kings station.
A Met police helicopter was seen circling above the station in the High Road, and the line was shut for around seven minutes between 5.30pm and 6pm.
The suspect is believed to have gone onto the track and has now been apprehended, according to a spokesman for rail operator Greater Anglia.
Police aren’t currently able to provide any further details.
The Greater Anglia spokesman said: “It only caused a very brief disruption.
“The worst affected train was only nine minutes late.”
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