Fire is seen at a building near the Saudi Embassy, in London, Britain, November 2, 2018, in this picture obtained from Twitter.

Forty firefighters have been sent to the blaze, in Chesterfield Street, Mayfair, after a 999 call at 9.16am on Friday. （Photo: Twitter）

Images shows a terraced building adjacent to the embassy in Mayfair engulfed in flames with fire crews attending to it. （Photo: Twitter）

Members of the public reported hearing explosions, and the fire brigade did confirm the reports. （Photo: Twitter）

Emergency services attend to a fire at a building near the Saudi Embassy, in London, Britain. （Photo: Twitter）

Emergency services attend to a fire at a building near the Saudi Embassy, in London, Britain. （Photo: Twitter）