The CBI has challenged the Patiala House court's ruling which had acquitted all the accused in the case.
The DMK was a key partner in the UPA-I government from 2004 to 2009, when Raja held the telecom portfolio, and till 2013 in the UPA-II regime.
2G spectrum case verdict: Special CBI court acquits Rajya Sabha MP Kanimozhi, Former Telecom Minister A Raja
The special 2G court has acquitted Former Telecom Minister A Raja and Kanimozhi, daughter of DMK chief M Karunanidhi & Rajya Sabha MP in the 2G spectrum case.
Rajeshwar Singh, a UP cadre official who was asked by the apex court to probe the case, had approached the bench after some frivolous complaints were received by Revenue Secretary against him.