Gupta family South Africa
Indian businessmen Ajay and Atul Gupta and Sahara director, Duduzane Zuma being interviewed by press in Johannesburg on 4 March 2011 Getty Images

A special South African police unit is considering whether to investigate allegations of corruption involving the Guptas, a wealthy Indian family accused of wielding excessive political influence in the country.

The opposition Democratic Alliance party sent a formal complaint to the police unit, known as the Hawks, calling for an investigation on corruption allegations involving three Gupta brothers and Duduzane Zuma, son of President Jacob Zuma, Bloomberg reported. Duduzane is the director of some Gupta-owned firms.

The complaint came as several officials claimed they were offered ministerial positions by the Guptas or were removed from their offices after refusing to accommodate the requests of the Indian magnates. The Guptas denied the allegations and Zuma said during a parliamentary session on 17 March that no minister was ever appointed by the family.

Zuma admitted the Guptas are his friends, but said there was nothing improper about their friendship.

Some analysts believe the president, who has been urged by the opposition to resign, will soon lose the trust of influential members within the ruling party African National Congress (ANC) due to the prolonged allegations of corruption and growing discontent.

However, on 23 March, ANC denied Zuma offered to resign following mounting pressure over corruption allegations. Stephen Chan, a leading academic specialising in South African affairs at London's Soas university, told IBTimes UK the mounting problems are unlikely to result in the ANC opting for a change of leader.