Several people have been injured in an explosion at a London train station around 8:20am on Friday morning (local time).

A number of commuters have suffered facial burns after a white container inside a bag exploded towards the rear of the train, reports several international media.

According to a metro.co.uk reporter people were “really badly burned” and “their hair was coming off”.

Witnesses say they saw a large flame before the train filled with smoke, however images of the carriage indicate almost no structural damage.

Heavily armed police are on the scene at Parsons Green Station and are reportedly evacuating residents in the area.

Foreign Secretary Boris Johnson has appealed for calm.

He told Sky News: “It really is important not to speculate at the moment. Everybody should keep calm and go about their lives in as normal a way as they possible can. The British Transport Police, TFL are on it. And they will be updating their websites as and when we get more information.”

BDST: 1515 HRS, SEP 15, 2017
AP