The Gauteng department of Health building at the corner of Sour and Market streets in Joburg caught fire on Wednesday morning.
Reports say a firefighter jumped from the burning building and died.
UPDATE: 3 FIREFIGHTERS STILL TRAPPED!
The firefighter fell from the upper floors of the building while extinguishing the fire and helping evacuate employees from the building.
The cause of the fire is not yet known.
More to follow.