The controversial painting of President Jacob Zuma in the Goodman Gallery in Johannesburg has been defaced, gallery staff confirmed on Tuesday.
A man is being held by the gallery security team.
“The work has been painted over with black and red paint,” a spokesman said.
Police are on their way to the scene.
On Twitter, expelled ANC youth leader Julius Malema said: “Guy who defaced Zuma spear is a national hero.”
– Sapa and Praag