In an unprecedented move by the Central government, Central Bureau of Investigation (CBI) Director Alok Verma and Special Director Rakesh Asthana were sent on leave till further notice and their offices were sealed on Wednesday. Joint Director M Nageshwar Rao, a 1986 batch officer, took charge as the interim chief of the investigaing agency with immediate effect. CBI building was sealed and neither staff nor outsiders were being allowed.