The CBI has questioned the Secretary General of the Delhi Commonwealth Games Organising Committee Lalit Bhanot for alleged financial irregularities in the Games. Earlier the investigating agency questioned a close aide of the Organising Committee (OC) Chairman Suresh Kalmadi. On Monday, the CBI grilled three personal staff members of Kalmadi in connection with the recovery of a broken CD and a letter demanding 4 crore rupees from him.