Commonwealth Games works under investigation are worth Rs 28,000 crore and time is required to probe them, the high-level Shunglu committee said on Tuesday.
"The total project costs worth Rs 28,000 crore. How do you expect me to complete the probe within three months," V K Shunglu said.
However, he declined to share details of the interim report submitted to the PMO on Monday on alleged irregularities in awarding broadcasting rights during Games.
The term of the panel has been extended till March 31 to submit its full report.
The Committee was set up by Prime Minister Manmohan Singh on October 25 last year and asked to submit its findings on financial and managerial lapses within three months.
The committee has collected CWG projects related documents from different central and state government departments.
Former Secretary of Department of Personnel and Training, Shantanu Consul, is also a member of the panel.
Several projects undertaken by the Municipal Corporation of Delhi (MCD), New Delhi Municipal Council (NDMC), Delhi Development Authority (DDA), Public Works Department (PWD), Central Public Works Department (CPWD), RITES, Sports Ministry, Urban Development Ministry and Games
Organising Committee are under the scanner of enforcement, investigating and vigilance agencies for alleged bunglings.
Besides, the CBI has registered four FIRs naming some of the close aides of OC chairman Suresh Kalmadi for alleged criminal conspiracy and financial irregularities in executing the contracts.
The CBI has also questioned Kalmadi and OC Secretary general Lalit Bhanot among others in connection with the cases.