Four armed men held up a security guard at Constantia Village on Sunday March 26, at 10am.
A white bakkie with five men pulled up at a container where the security company stores tools and equipment.
Diep River police spokeswoman Sergeant Amanda Gordon said three men approached the guard telling him they were dropping off tools. They asked him to bring the occurrence book in which guards keep records of what takes place on-site.
When his back was turned, they entered the container and threatened the guard with a knife, tied him up with duct tape and took his cellphone, wallet and two bags of safety helmets.
There were no injuries. Police are investigating a business robbery and the robbers are still at large.
Anyone with information can contact Detective Sergeant Arnold Bosch at 021 710 7360.