New Delhi, April 25 (IANS) The Bharatiya Janata Party (BJP) Monday questioned the Central Bureau of Investigation (CBI) for not naming Tamil Nadu Chief Minister M. Karunanidhi's wife Dayalu Ammal in the second chargesheet in the 2G spectrum scam, saying the agency should tell if it was facing political pressure.

 
 "The 60 percent shareholder (in the Kalaignar TV) Dayalu Ammal has not been named. We wonder if there was political pressure on CBI... Has there been political bargaining, a political threat that there will be withdrawal of some UPA (United Progressive Alliance) ministers," BJP spokesperson Nirmala Sitharaman said.
 
 She said the BJP failed to understand why Dayalu Ammal has not even been named in the chargesheet.
 
 The CBI Monday named five more people, including Karunanidhi's daughter Kanimozhi, as co-accused in the case involving the award of second generation (2G) phone spectrum.
 
 The supplementary chargesheet - the second thus far, filed by the probe agency in a special court here, also names as co-accused Sharad Kumar of Kalaignar TV, Karim Morani of Cineyug Films, and Asif Balwa and Rajiv B. Agarwal of Kusegaon Realty.