New Delhi: Central Bureau of Investigation (CBI) chief Vijay Shanker on Thursday retired, however, the government is yet to name a new head of the agency.

The outgoing CBI chief sought speedy disposal of cases handled by the premier investigating agency.

"Around [30 million] cases are pending before different courts across the country. The CBI needs to brace itself up for the challenge," Shanker told reporters here.

Special Director M.L. Sharma is widely speculated to succeed him but a notification to this effect is yet to come.

Cases tackled

During Shanker's tenure, the CBI handled cases like blasts in Mecca Masjid and Malegaon and Aarushi Talwar-Hemraj's double murder. As many as 14 people were killed and over 50 injured in a bomb blast in the Mecca Masjid in Hyderabad and in the subsequent police firings in the nearby areas in May last year. In September 2006, two bomb blasts ripped through Malegaon killing at least 40 people. The sensational Aarushi Talwar-Hemraj double murder took place in Noida near the national capital in May this year.

Shanker on Wednesday met reporters as part of his farewell. Shanker, who retired after a 39-year career, was all praise for the media for keeping a check on the agency. In the meeting, he avoided commenting on controversial issues including Uttar Pradesh Chief Minister Mayawati's charge that the agency was being used by the government against her.