Our officers were called to a trespass incident near Charlton station at 2am on Wednesday 13 August, after reports of a man on the tracks.
Colleagues from the Metropolitan Police Service and London Ambulance Service are also in attendance. The man is currently still on the scene, and specialist officers are talking to him in order to resolve the situation.
More top news
A drunk man who narrowly escaped death when he lay down between train tracks in Harlow has been given a 12-month community order.
A man from north London has been charged with the manslaughter of Louella Eve Fletcher-Michie, who died at the Bestival music festival.
The mother of Ellie Butler - the six-year-old murdered by her father - has lost a bid to challenge her conviction.