Police arrested three people in raids Wednesday on various properties of the Gupta brothers, close associates of embattled South African President Jacob Zuma.
South Africa's state broadcaster, SABC, said a Gupta family member was among those detained.
Read more: South Africa's power family, the Guptas: What you need to know
The raid by the Hawks, an elite police investigative unit, comes a day after the ruling African National Congress ordered Zuma to step down as head of state.
Watch video 00:32 ANC says it has asked S. African President Zuma to step down