RJD chief Lalu Prasad and Bihar state Congress President Choudhary Mehboob Ali Kaiser today demanded a CBI probe into the killing of ruling BJP MLA Rajkishore Keshri. Talking to reporters in Patna, Mr. Prasad alleged that there is something mysterious and it has to be uncovered. Mehboob Ali said the woman is alive and it will be in the interest of the investigation by an agency to go into what forced her to attack the MLA. He also demanded review of security of the MLAs and MPs in Bihar. Keshri was stabbed to death allegedly by Rupam Pathak in full public view at his residence in Purnia yesterday when the legislator was meeting visitors.