CBI sources said Mittal was examined for nearly three hours yesterday evening where he was asked about promotion of Mahesh Kumar from General Manager (West) to the Board and also about allowing him to retain additional charge of Western Railway even after his elevation.
The sources said Mittal is not an accused in the case registered by the agency on May 3 this year in which Singla and Kumar are the main accused.
The case relates to reported aspirations of Kumar for his elevation as Member (Electrical) in the Railway Board for which he allegedly contacted Goyal, a close associate of Singla. Goyal allegedly demanded Rs 10 crore for it.
Kumar was in between elevated from GM (West) to Member (Staff) in Railway Board, a post which he was apparently not very interested in. He then allegedly asked Goyal to help him retain the additional charge of GM (West) for which the middleman demanded Rs two crore as immediate payment.
CBI has so far arrested eight accused in the case.