CBI sources said assistant engineer R K Sethi and a driver has been arrested by the agency today evening.
They said the agency is on the trail of prime accused Superintendent Engineer Rajesh Wadhwa.
The sources said the agency had received information about Wadhwa who was kept on surveillance during which it came to light that he was allegedly striking a deal with Rajesh Agarwal and Manish Tuli for clearance of their proposed banquet hall in Wazirpur.
In subsequent searches at 15 locations, CBI had recovered Rs 74 lakh cash from Junior Engineer Kapil while Rs 37 lakh and jewellery was seized from the home of arrested MCD official
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Satish, they said.
"Rajesh Agarwal, co-founder, Micromax Informatics Limited has stepped down from his duties and recused himself from the responsibilities. He will focus on the legal proceedings to clear his name of the alleged charges," Micromax said in a statement today.
"Rajesh Agarwal was present in his personal capacity with Manish Tuli," it said.
The agency has so far arrested nine persons in connection with the bribery scam.