"One of our anti-poaching dogs alerted her handler at about 4.30 am Monday morning that something was amiss", the post says.
A vet then had to tranquilise the six lions so police could go inside and recover the remains of the mauled poachers. Police have been patrolling the reserve via helicopter and have yet to find any other poachers.
"They [found] an ax and high-powered rifle with a silencer, which is a surefire sign of rhino poachers", Fox said.
As of Thursday, it is not clear exactly how many poachers were killed, according to Fox, but local police are still investigating.
"They were clearly intent on killing rhinos and cutting off their horns", he continued.
Though it is estimated there were three poachers, officials can not be certain just yet.
Mr Fox said it was not clear exactly how numerous men there were, as there was "not much left of them".
So far this year, more than nine rhinos have been killed in the Eastern Cape province, according to the BBC. Despite the fact that rhino horn's virility-boosting and medicinal effects are a myth, powdered horn sells for up to $100,000 per kilogram in Vietnam, worth more than its weight in gold.