Videos seen by Muhabarishaji.com showed smoke billowing from the top floor offices of the building located opposite Khoja Mosque.
The fire brigade responded but the smoke could still be seen billowing from the building.
Following the incident, Thika Highway from the Khoja roundabout was temporarily closed to allow the first responders to put out the inferno before it spread to other parts of the large building.
This comes amid a puzzle and investigations into a fire that razed down the home Political Analyst Mutahi Ngunyi on Wednesday, July 14.
More to follow