Johannesburg Emergency Services spokesperson Nana Radebe told News24 that paramedics were on scene.
Tweets from Independent Online confirmed that a body lay on the pavement next to the building.
Radebe said the building was evacuated after the fire broke.
Further details were not immediately available.
This article is more than 7 years old
South Africa
Firefighter falls from upper floor of govt building while battling blaze
A firefighter fell from the upper floors of a government building in the Johannesburg CBD while battling a blaze there on Wednesday morning.
