The CBI has taken cognisance of a complaint alleging that information about its planned searches in connection with the coal scam was leaked beforehand to companies in September last year.
The complaint in this regard was made to the Central Vigilance Commission by Lucknow-based IPS officer and activist Amitabh Thakur.
Sources said the agency has take cognisance of the complaint.
The CBI may soon start probe into the allegations.
Three days after the registration of the case and search operation in connection with the coal mine allocation scam, a complaint in this regard was made to Central Vigilance Commission by Thakur.
After nearly five months of the complaint, the agency has now demanded material available with Thakur to substantiate the allegations for "urgent necessary action."
Soon after registering five FIRs in the alleged irregularities in allocation of captive coal mines by private companies on September 3, 2012, the agencies carried out a massive search operation spread across 30 locations across the country which included premises of some leading mining barons.
Five companies were named in the FIR and during search operations, premises of their directors and offices were covered.
Soon after the searches were carried out, convener of Aam Aadmi Party Arvind Kejriwal had alleged in a press conference that the CBI action was an eye-wash as information was leaked to these companies before hand.
Kejriwal-led India Against Corruption had claimed that it came to know that the companies, which were raided in connection with the coal allotment scam, were "tipped off in advance so that they could destroy all evidence against them".
Following Kejriwal's press conference, Thakur had sent a complaint to CVC with a copy to the CBI director seeking a probe into these allegations as they were serious in nature.
In his complaint dated September 7, 2012, Thakur requested suitable enquiry and appropriate action in the matter. He had demanded action against Kejriwal if the allegations were found to be unsubstantiated.