Earlier in the day, former Telecom Minister A Raja told a Delhi court that he would not respond to CBI's fresh plea to invoke additional charge of criminal breach of trust against all the accused till the agency stated that its probe in the 2G spectrum allocation scam was over.

Special CBI Judge O P Saini, who was to receive replies of 17 accused including Raja on the plea of CBI, was taken aback when senior advocate Sushil Kumar, appearing for the DMK leader, said he would not participate in hearings till CBI clarified its position on the status of probe.

"I am taking a very clear stand that till the time CBI files an affidavit or says it on oath here that investigation is complete or going on, I am not going to participate in the proceedings of this case," Kumar said.