Officials said the three others who have been arrested are Ghosh's security guard Afsar Ali (44), and hospital vendors Biplav Singha (52) and Suman Hazara (46) who used to supply material to the hospital.
The agency has slapped Section 120B of IPC (criminal conspiracy) read with Section 420 IPC (cheating and dishonesty) and Section 7 of Prevention of Corruption Act, 1988 (amended in 2018) which covers unlawful acceptance of gratification by a public servant.
Former Jharkhand chief minister Madhu Koda was arrested on Monday morning in the Hawala scam totaling to about Rs 2,000 crore.
Making it clear that there will be no compromise on corruption, Delhi Chief Minister Arvind Kejriwal on Sunday said anyone embroiled in corrupt practices will not be spared be it former chief minister Sheila Dikshit, any Bharatiya Janata Party member or even his own party member.
The onus is on companies to put in place a vigil mechanism to detect and deter fraud.