Correctional Services spokesman Manelisi Wolela has denied allegations that student leader Mcebo Dla.
Rihanna claims her relationship with Matt Kemp is not serious.
The Russian Roulette singer - who was first linked to the baseball star at the beginning of the year - has finally confirmed she is dating the hunky sportsman but insists the pair are just having "fun".
She told Ryan Seacrest on his KIIS FM radio show: "He's my boyfriend. It's new, and it's fun and it's nothing too serious, you know. I don't want anything that's going to take up so much of my energy and time right now in a bad way. I just want to have fun, and that's what it's about."
Though the 22-year-old beauty has no plans to settle down in the near future, the same cannot be said of her friends. Katy Perry is set to tie the knot with fiancé Russell Brand later this year and has given Rihanna the daunting task of planning her hen party.
The Umbrella hitmaker said: "She put that on me last week. Now I have to come up with something cool, because she's getting married in India, so I'm like, okay now what do I do to match that for a bachelorette party?"
As well as giving Perry a party to remember, Rihanna is also focussing on her forthcoming Last Girl On Earth tour - which starts in Seattle on July 2 - and has been taught to play the drums for it by blink-182 drummer Travis Barker.
She said: "It's so difficult. It's a lot of coordination. I thought I had coordination until I started playing drums. But he makes it really clear to understand." - Bang