Cricket South Africa (CSA) is investigating an incident of alleged racist abuse directed at Imran Tahir in the fourth ODI against India on Saturday.
Footage emerged on social media of Tahir remonstrating angrily with fans in the stands at Wanderers Stadium.
A man was ejected by security, and CSA has insisted Tahir was not involved in any physical altercation.
A CSA statement read: "Cricket South Africa has noted and is aware of the circulation of video footage featuring Imran Tahir on social media and Whatsapp groups.
"Imran Tahir was verbally and racially abused by an unknown man during the fourth One-Day International (ODI) against India at the Bidvest Wanderers Stadium on Saturday.
"Tahir reported the incident to the stadium security, and was subsequently accompanied by two security personnel to identify and to have the man ejected from the stadium.
"Tahir made no physical contact with the offender or any of the children in the vicinity. The incident is under investigation with the CSA and stadium security teams.
"In accordance with the ICC Anti-racism code, spectators who engage in racist conduct are to be ejected from the stadium and can face further sanctions and criminal prosecution."
South Africa won the fixture by five wickets, but still trail 3-1 in the six-match series.