Six rhinos were killed and their horns cut off by poachers in just one night at a game reserve in South Africa.
The animals were targeted at Hluhluwe-Imfolozi reserve in KwaZulu-Natal, where park rangers have been struggling to deal with the huge number of attacks on the animals.
Rhino horn commands a high price because some people believe it has medicinal properties.
Eleven gunshots were heard at the game reserve, where many tourists go on safari, on Sunday.
The bodies of the white rhino were then discovered.
South African site News24 said 139 rhinos have been killed in the district so far this year.
They said across the country, around three are killed every day.
Former England cricketer Kevin Pieterson, who is South African, tweeted his sadness at the mounting death toll of rhinos.
Another two that were killed over the weekend!
I’m hopefully close to starting a doc on this.
We have to try and stop this!
Pls RT! pic.twitter.com/bMFRYJiGPu
— KP (@KP24) July 5, 2017
White rhinos are seen as a conservation success story, brought back from only 100 in the wild in 1895 to around 20,000 today.
They have no natural predators except for human beings.
However, they are still threatened, with poachers becoming increasingly better equipped.
More than 6,000 have been shot and mutilated in South Africa alone over the last decade.
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