Johannesburg - An ANC supporter was killed outside a voting station in KwaDukuza, KwaZulu-Natal, on Wednesday, the party said.
The man was allegedly killed by a member of an opposition party, African National Congress spokesman Jackson Mthembu said in a statement.
KwaZulu-Natal police could not immediately be reached for comment.
Electoral Commission of SA (IEC) spokesman for the province Thabani Ngwira said he had not heard of the incident.
The ANC called on the IEC and police to urgently investigate the matter.
"This killing is clearly calculated to undermine free and fair elections."
He appealed to ANC supporters to exercise restraint.
Earlier, acting Communication and Information System CEO Phumla Williams said in a statement that two deaths outside polling stations were recorded on Wednesday but did not provide further details.
She said 97 people were arrested for offences related to Wednesday's general elections.Use our live maps for up to the second election results by clicking here.
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