Dozens of firefighters are still at the scene of a suspected ‘chemical incident’ on Dulwich Road, Herne Hill.
Police have just re-opened the road after closing it in both direction and specialist ‘scientific support units’ are also standing by.
According to reports they initially suspected a carbon monoxide leak in a ground floor flat. Parts of Chaucer Road have also been sealed off.
Officers first arrived at a house on the corner of Chaucer Rd and Dulwich Road at about 6.15pm.
A fire officer at the scene said: “We evacuated several people from the flat who appeared to be overcome by fumes.”
No-one is thought to have been seriously hurt during the incident, though at least one was treated by paramedics.