International Rhino Foundation (IRF) communications director Christopher Whitlatch said: "Zimbabwean rhino poachers have been involved in major illegal activities in South Africa. "Taking the Eastern Cape as an example, the Zimbabwean rhino poaching gang that recently escaped from jail had been convicted for killing and dehorning numerous rhinos in hit-and-run incidents in that province. "Other cross-border rhino crimes include South African criminals operating in Zimbabwe," he said