MUMBAI, Oct. 16 -- The Central Bureau of Investigation (CBI) has arrested three persons, including an Indian Revenue Service (IRS) officer working as deputy director of the Serious Fraud Investigation Office (SFIO) in an alleged Rs.1 crore bribery case. The CBI acted after registering a case against Harish Kumar Tanwar, the accused IRS officer working as a deputy director with the SFIO, Ministry of Corporate Affairs, Chennai, and a Delhi-based advocate, Bharat Sharma, along with others, on allegations that they had demanded undue advantage of Rs.1 crore from the complainant for allegedly favouring him in an investigation being conducted by the SFIO related to the Dewan Housing Finance Corporation Limited (DHFL) fraud. Tanwar, a 2017 batch IRS officer, was the investigating officer of the case. After verification of the complaint and registration of the case, the CBI laid a trap and arrested Tanwar, Sharma and the latter's relative Aryan Sharma. The arrests were effected after the advocate allegedly received an undue advantage of Rs.20 lakh from the complainant, as part payment of the demanded bribe of Rs.1 crore, for and on behalf of the SFIO officer, CBI officials said on Thursday. During the course of the searches conducted at the premises of the SFIO officer and the advocate, material related to the case has been recovered, the officials said. The CBI on Tuesday registered a case against Tanwar, the lawyer and unknown public servants/others, based on a complaint from a businessman. The businessman had submitted a complaint to the CBI on Monday, alleging about Tanwar's bribe demand and that he had been threatened of arrest in connection with the SFIO's investigation....