A 24-year-old woman was seriously injured by a rhino moments after posing for a photograph with it, South Africa's Beeld newspaper reports.
Chantal Beyer suffered injuries to her shoulder, lungs and ribs after being gored at the Aloe Ridge Hotel and Game Reserve, some 40km from Johannesburg.
Ms Beyer, a student from West Rand, was with her husband and several other people on a game drive in the reserve.
She is said to be in a serious but stable condition in hospital.
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South Africa is home to some three-quarters of the world's rhinoceros population of about 28,000 animals.
But the country has seen a substantial rise in poaching in the past year amid a reported growing demand for rhino horn in parts of Asia where it is believed to have medicinal powers.