A man was found dead under a bridge in “unexplained” circumstances in Plumstead on Wednesday afternoon.
Police were called to reports of a man collapsed just before 2pm on Wednesday.
Paramedics from the London Ambulance Service (LAS) attended and found an unresponsive man.
A spokesman for the LAS confirmed he was pronounced dead at the scene.
A post-mortem examination of the man will take place in due course.
His death is being treated as unexplained.