The case was registered by CBI after the Prime Ministers' Office(PMO) asked the agency to probe the allegations by some businessmen in Gujarat that Singh had been demanding bribes while investigating a case related to IPL betting probe.
Initially a discreet inquiry was conducted after which the case was entrusted to the CBI for a thorough probe.
Singh, who is posted as Joint Director in Directorate's Ahmedabad branch, was summoned to the CBI headquarters here and questioned by the sleuths, official sources said today. Singh is a 2000 batch Indian Revenue Service(IRS) officer of Customs and Excise wing,
The ED's Ahmedabad unit was probing two important cases--Rs 2,000 crore IPL betting scandal and Rs 5,000 crore money laundering case against alleged hawala operator Afroz Fatta in which the suspects allegedly sought favours, sources said.
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After registering the cases, CBI carried out searches the ED office in Ahmedabad and residences of Singh and Additional Directors Sanjay Kumar and P S Srinivas, both ED cadre officers in Ahmedabad, and Somvanshi here in Delhi, they said.
"It has been alleged that certain officers of Enforcement Directorate while investigating the cases of money laundering in betting and other such activities have allegedly demanded and accepted huge illegal gratification from the accused and suspect persons in the said cases.
The ED, meanwhile, has sent a report to the Finance Ministry for "immediate action".