An alleged racial slur has threatened to overshadow South Africa's Rugby World Cup semi-final victory over England.
As the Springboks took a dramatic 16-15 win over England at Paris on Sunday (NZ time), hooker Bongi Mbonambi is alleged to have called England flanker Tom Curry a "white c***".
"Sir, if their hooker calls me a white c***, what do I do?" Curry was heard asking referee Ben O'Keeffe.
"Nothing please," replied O'Keeffe. "I will be on it."
The two players were pictured coming together after the final whistle, as tensions threatened to boil over between the two sides.
England have until Monday evening (NZ time) to make a complaint to World Rugby, with a 36-hour post-match citation window.
Meanwhile, South Africa Rugby has said it will investigate the incident.
"We are aware of the allegation, which we take very seriously, and are reviewing the available evidence," it said. "We will engage with Bongi, if anything is found to substantiate the claim."
Both England coach Steve Borthwick and South Africa assistant coach Deon Davids have refused to discuss the incident further.
If found guilty, Mbonambi would breach of rugby's law 9.12 that states a player must not verbally abuse anyone.
Breaching that law could earn Mbonambi a ban of one or more matches, ending his involvement in the Rugby World Cup final against the All Blacks on Sunday (NZ time).
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