Over 100 firefighters rushed to put off fire on hotel roof

On Wednesday, about 25 engines and 120 firefighters and officers have been called to contain a blaze on the roof of a hotel in Knightsbridge, central London. The cause of the blaze hasn't been identified as yet.
 

The smoke is said to be coming from the five-star Mandarin Oriental hotel, which has been evacuated. 

There have been no reports of casualties or injuries as yet.