Images and videos shared on social media appear to show smoke and flames flowing from Parliament in Cape Town.
Local reports indicate Cape Town Fire & Rescue services have confirmed there is a fire at the building.
Firefighters have been deployed and are reportedly at the scene.
The cause of the fire has not yet been confirmed.
The fire broke out as South Africans woke up on January 2.
Some footage, shared on Twitter as early as 6.45am local time, suggested Capetonians could see the blaze from far and wide.
One user even shared footage of the flames from Table Mountain, some five miles from the building.
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