Chandigarh, Feb. 26 -- Haryana's state vigilance and anti-corruption bureau has arrested four people, including the alleged masterminds behind the, Rs.590-crore IDFC First Bank fraud case, officials said on Wednesday. The arrests were made on Tuesday evening as part of the ongoing investigation into the fraud that has rocked the Haryana government. State Vigilance and Anti-Corruption Bureau (SV&ACB) Director General Arshinder Singh Chawla identified the arrested individuals as Ribhav Rishi, Abhay Kumar, Swati Singla, and Abhishek Singla. Chawla identified Rishi, who served as head of the bank's Sector 32 branch in Chandigarh until about six months ago, and Abhay Kumar, a relationship manager who resigned in August last year, as "masterminds" behind the fraud. While Swati is allegedly Abhay's wife, Singla is a private individual, Chawla said. According to investigators, Rishi and Abhay orchestrated the diversion of government funds. Swati and her brother Abhishek ran a firm named Swastik Desh Projects. "Abhay's wife Swati, along with her brother, had set up a company Swastik Desh Projects, owning 75% and 25% stakes, respectively," Chawla said. The DG said preliminary investigations had revealed that about Rs.300 crore of government funds were transferred to Swastik Desh Projects' account in AU Small bank, leading to the four arrests. Chawla said nearly Rs.300 crore - over half of the total fraud amount - was transferred into the account of Swastik Desh Project. "This is the main private company into whose accounts most of the funds were transferred. According to the bank records, nearly Rs.300 crore was transferred, and later the money was moved further," Chawla said. "We have discovered that out of Rs.590 crore, the aggregate amount currently under reconciliation and suspected to be fraudulently transferred, a large portion of money belonged to Haryana government departments. However, there are certain accounts of Chandigarh administration....