The officials of the two clubs submitted relevant documents to the investigating agency pertaining to deals which they had done with the tainted Saradha group, a CBI source told PTI.
Earlier, the two clubs had been put under the scanner of the ED, which had subsequently sealed their bank accounts.
Both the CBI and the ED had earlier interrogated Trinamool Congress Rajya Sabha MP Srinjoy Bose who is also a senior office-bearer of the Mohun Bagan club.
Meanwhile the ED, which had frozen the bank accounts of the two clubs, refused to defreeze them as requested by their officials on the ground of financial difficulties.