Chief electoral officer mosotho moepya
IEC: DA MP is a legal South African
The IEC says it accepted Phumzile van Damme's candidature for MP because her ID documents were valid.
IEC says they need to establish the facts before determining the credibility of its results.
With around 63,79% of the national vote counted, the ruling party looks set to retain power.
The ruling party won two out of three wards in the by-elections held on Wednesday.
IEC CEO Mosotho Moepya says they are trying to work out what happened.
Over 80 percent of first time voters are not yet registered according to the IEC.
The UN played its part in helping the world pay tribute to Madiba on his 94th birthday.