CBI has closed probe against Arun Shourie in the 2G case, after nearly 19 months of its preliminary enquiry into telecom spectrum allocation during 2001-07. Arun Shourie was the Telecom Minister during that period. After registering the preliminary enquiry in January, 2011, the CBI had found alleged irregularities during the tenure of two ministers — the late Pramod Mahajan and DMK leader Dayanidhi Maran — in which it had filed FIRs.

CBI sources said that the first-come, first-served policy adopted during Shourie's tenure was to promote telecom services in less lucrative areas where telecom operators were reluctant to go. During its probe, the agency scrutinised meetings chaired by Shourie, observations of Shivraj V Patil committee besides other documents and concluded that no irregularity was committed during his tenure.

The agency has booked former telecom secretary Shyamal Ghosh and three private cellular companies for alleged irregularities in awarding additional spectrum during Mahajan's tenure while Maran has been named in Aircel-Maxis deal probe.