Former telecom minister A Raja will be questioned by the CBI in Delhi in the next couple of days in connection with the 2G spectrum allocation scam.

"I am going to Delhi. I will be there for two-three days. I will cooperate with the investigating agency," Raja told reporters at the State guest house in Chennai before leaving for Delhi on being asked when he would appear before the investigating agency.

The minister, who was on Monday issued summons along with corporate lobbyist Niira Radia to appear before the agency, said he has informed CBI that he will be in the national capital for two-three days. Raja had on Tuesday said that he was waiting for the dates from the CBI for appearing before it.

The supreme court has asked CBI and the Enforcement Directorate to submit status reports on their investigations into the 2G scam to it by February 10, when the 2G spectrum case will come up for hearing.

The Comptroller and Auditor General of India (CAG) in its report to Parliament had said that the allocation of 2G spectrum at undervalued prices had resulted in the loss of Rs 1.76 lakh crore to the exchequer.

47-year-old Raja was forced to resign as telecom minister in the wake of the government auditor's report.

Radia was questioned by the CBI on Tuesday at her south Delhi farmhouse for four hours. Radia hit the spotlight after her taped telephonic conversations with various influential people including industrialists, politicians and journalists became public.

Supreme court is closely monitoring the multi-agency probe in the allocation of 2G spectrum to certain telecom firms.

It has criticised the CBI for its slow pace in the probe and had asked why none of the high-profile people including Raja has not being questioned so far.