The Central Bureau of Investigation on Saturday did not rule out questioning former Union Minister of State for Finance Gingee Ramachandran in the cash-for-transfer scam with its chief P C Sharma saying it all depended on the iinvestigations.   

Sharma, who briefed Deputy Prime Minister L K Advani on the bribery case, said the former minister's personal assistant R Perumalswamy and his Chennai-based chartered accountant A Krishnamurthy, who are in custody, were being interrogated.

"More leads will emerge during interrogation and we will pursue them to their logical end," Sharma, who had a 20-minute meeting with Advani, told reporters.

Asked whether the CBI would also be questioning the former Union minister, he said: "I can't say as of now. All depends on further investigations especially that of Krishnamurthy."

Sharma had on Friday briefed Prime Minister Atal Bihari Vajpayee about the case and the recoveries made from Perumalswamy and Krishnamurthy.

The documents recovered from Krishnamurthy's residence in Chennai could lead to a new trail in the scam.

Another person, Padmanabhan, a project associate at the Centre for atmospheric science, Indian Institute of Technology, Delhi, was also arrested on Thursday night.

Padmanabhan is alleged to have driven Perumalswamy to the residence of Indian Revenue Service official Anurag Vardhan and was present when the money changed hands.