With the arrest of two delivery boys, the total number of arrests by the agency in the bribery scandal have risen to six which also include--Singla, Railway Board Member (Staff) Mahesh Kumar, middlemen Sandip Goyal and Manjunath.
All the accused are being brought here and would be produced before the Patiala House court. The agency would seek their remand for questioning at the headquarters.
CBI sources said crucial documents related to various railway projects besides records of Board discussions are among some seizures made from the residence of Mahesh Kumar, a 1975 batch Indian Railway Engineering Services, in Mumbai.
Singla, who is a close aide of Bansal and was regularly seen in election campaigning alongside, had allegedly demanded Rs 10 crore for getting Kumar posted as Member (Electrical) which is considered next to Railway Board Chairman in hierarchy, the sources said.
The agency, which has received a tip-off about the alleged deal, had kept Singla and Kumar's phones on surveillance and were keeping a tab on all their movements, the sources said.