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
Three security staff at a Vauxhall nightclub have been cleared of manslaughter after a man they restrained passed out and later died
A family is homeless after a fire in their tumble dryer. The family had been in touch with the manufacturer after a recall notice went out.
The crew's union Unite said the airline was "joining the 21st century" following a two-year row over the issue.