New Delhi, Sep 25 (IANS): CBI Superintendent of Police Satish Dagar, who was part of the team that probed the agency's then Special Director Rakesh Asthana last year, has sought voluntary retirement on "personal grounds", an official said on Wednesday.

A Central Bureau of Investigation spokesperson told IANS: "Dagar has written an application to the agency seeking voluntary retirement from service on personal grounds."

Dagar was part of the team that probed Asthana, when then CBI Director Alok Verma and then Special Director were engaged in a bitter fight.

Verma and Asthana were then both sent on leave by the government.

However, when the government appointed senior IPS officer M. Nageshwar Rao as the acting Director of the agency on October 24 last year, he transferred Dagar from the Economic Offences Wing to Anti-Corruption wing in Delhi.

Besides Dagar, several other senior CBI officers probing the case against Asthana were also transferred.