London fire brigade is tackling a blaze in Elephant and Castle, south London.
The fire appears to have started beneath railway arches near the train station and a huge plume of smoke could be seen billowing above the area.
In a tweet, the fire brigade said: “We have 10 fire engines and 70 firefighters attending and have taken nearly 50 999 calls. Please avoid the area.”
Videos on social media showed large plumes of smoke appearing to pour from Elephant and Castle station, with one clip showing a small explosion erupt from inside.
Sara Scarpa lives in nearby apartment building Hurlock Heights and said smoke and the noise of the explosion had reached her window.
“We opened the window for a sec as you could hear people shouting, and we smelt something very very strong,” she said. “The smoke [was] dying down a little … we heard an explosion and now it started again.”
The fire is believed to have started at garages close to the station, the London fire brigade said.
A spokeswoman for the service said that the blaze was first reported at 1.43pm on Monday and the train station has been closed.
Thameslink said all lines through Elephant and Castle were blocked because of the fire.
Services between St Albans and Sutton and London Blackfriars and Sevenoaks are affected.
Thameslink said in a tweet: “You will have to use an alternative route to complete your journey and you should allow plenty of extra time to complete your journey. To help keep you on the move, you can use your ticket on: London buses between London Blackfriars, Denmark Hill and Loughborough Junction, London Underground and Southeastern trains between London Victoria, Peckham Rye, Nunhead and London Bridge to Sevenoaks.”