South African police have opened an investigation after a man was kidnapped and raped by three women who collected his semen before dumping their victim.

The unidentified 33-year-old man was reportedly bundled into the back of a black BMW at gunpoint after he gave the three women directions when they pulled over in the Kwazakhele Township, Port Elizabeth.

The women failed to arouse the man during the course of the journey, instead forcing him to drink an “unknown substance” before reportedly individually raping him and placing his semen into plastic bags, storing them in a cooler box.

Afterwards they allegedly ejected the man from the car, approximately 500km from where he was originally picked up, the Mail Online reports.

Police constable Mncedi Mbombo said the victim was “still scared” and added: “This is really confusing to us because we have never heard of such a thing before.