A controversial painting depicting South African president Jacob Zuma exposing his genitals has been vandalised at the Goodman Gallery in Johannesburg. The image, which has prompted Zuma to take legal action to have it removed from the gallery, has been covered in black and red paint. The painting — entitled The Spear — by provocative artist Brett Murray, has already been sold for $14,000 (£9,000). The vandals claimed the the painting is “disrespectful to President Zuma”.