JOHANNESBURG, South Africa - South African wildlife officials say a ranger is among four Kruger National Park workers arrested on rhinoceros poaching charges.

In a statement Wednesday, the national parks department said the four were arrested Tuesday by officers investigating the killing of two rhinos whose corpses were found earlier that day. The animals had been shot and stripped of their horns, which are prized among some who believe they have medicinal powers.

The parks department says the ranger arrested is among scores who have been striking for higher pay since early February.

Across the country, 80 rhinos have been poached since the beginning of 2012, more than half in Kruger, the country's flagship park. Last year, a record 448 rhinos were poached in South Africa.