Police say the suspect who allegedly stabbed a hiker to death near Boyes Drive in St James on Sunday posed as a security guard.
The man, 56, was stabbed while hiking with his partner.
The incident comes less than three weeks after nine hikers were attacked and robbed of their possessions while hiking on St James Peak earlier this month.
That incident led to the deployment of extra resources on the mountainside above Kalk Bay.
On Sunday, police spokesperson Noloyiso Rwexana said a murder case had been opened for investigation following an incident in Echo Valley, opposite Boyes Drive in St James, Muizenberg, reports the Cape Times.
“According to information, a 56-year-old man was stabbed while hiking with his wife by a suspect who was wearing a security uniform.
“The victim died due to his injuries. No one has been arrested so far.”
Hikers Network president Anwaaz Bent said: “We are concerned about the recent spike in attacks on the mountains.
“I came to learn about this just after it happened. It is really disturbing that people are not safe out there any more.”