Eight people, including children, have been injured in a incident involving a “corrosive substance”.
The incident happened in Clapham, South London.
The London Fire Brigade said in a statement: “Firefighters were called to a chemical incident on Lessar Avenue in Clapham this evening.
“Working alongside emergency service partners, crews provided immediate emergency care to a woman and two children. Five further people were also treated at the scene. They were all taken to hospital by London Ambulance Service crews.
“Crews also used specialist equipment to detect a corrosive substance that is believed to have been used in the incident.”