"We ave questioned six engineers of the PWD today (Saturday)," ACB chief Mukesh Kumar Meena told IANS. However, he refused to share details.
The ACB action follows filing of three cases on May 9 against Bansal and senior PWD officers in connection with the alleged corruption charge.
On May 9, the ACB had summoned the engineers to join the probe for their role in the scam.
The case involving Bansal, who died on May 7 in a Gurgaon hospital, relates to a drain project and improvement of kerbs from Shani Mandir to Bakoli village up to Drain No. 6 on the National Highway-44.
The FIRs do not mention Aam Aadmi Party (AAP) chief Kejriwal's name, although complainant Rahul Sharma, Convener of NGO Road Anti-Corruption Organisation, had accused the Chief Minister of helping kin Bansal to get fake bills of around Rs 10 crore cleared.
The three FIRs were registered against Bansal and the PWD officers after it was discovered that the bills were cleared by different companies for different works.
"Bansal got the pending bills of around Rs 10 crore cleared due to Kejriwal's influence. He set up three companies -- Ranu Construction, Pawan Construction and Kamal Construction -- in whose names he got the bills cleared from the PWD," NGO's General Secretary Vilav Awasthi told IANS.
According to the officials, the ACB had questioned Sharma for a couple of hours on May 11. The ACB team also visited the PWD office to collect some files and documents related to the scam the same day.
The matter was being investigated by the Delhi Police Economic Offences Wing, but it was later transferred to the ACB.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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Doraiah Chowdary Vundavally is a Software engineer at VTech . He is the news editor of SocialNews.XYZ and Freelance writer-contributes Telugu and English Columns on Films, Politics, and Gossips. He is the primary contributor for South Cinema Section of SocialNews.XYZ. His mission is to help to develop SocialNews.XYZ into a News website that has no bias or judgement towards any.