On Tuesday, General Singh had forwarded to CBI a complaint letter from Trinamool MP Ambika Banerjee of May last year which had alleged corruption in purchases for the Special Frontier Force during the tenure of Lieutenant General Dalbir Singh Suhag as its then Inspector General.
General Suhag now commands Dimapur-based three Corps and is in line -after Lieutenant General Bikram Singh-to be Army Chief.
CBI sources said since the issue had already been probed by the Cabinet Secretariat last year and no wrong-doing was found, there was no need for another probe by it.
The Special Frontier Force works under the Research and Analysis Wing (RAW) which is controlled by the Cabinet Secretariat.
Naming several senior Army officers, the MP had alleged kickbacks were paid in the deals relating to supply of crucial equipment for the secret force ranging from night vision devices to parachutes, the sources said.
CBI had approached the Cabinet Secretariat, which controls the RAW, seeking to know if they had conducted a probe into the allegations levelled by the MP, agency sources said.
They said the Cabinet Secretariat had informed them that an extensive probe was conducted into the allegations levelled by the MP last year but nothing was found.
Following the intimation of the Cabinet Secretariat, CBI has returned the complaint saying if any new material is brought out, it can probe but as far as this complaint is concerned there was nothing to be probed.