The investigation into the Aryan Khan - Mumbai cruise drugs case has been transferred from the Mumbai zone of the Narcotics Control Bureau to a central team of the agency. Sameer Wankhede, zonal director of NCB's Mumbai unit, will no longer supervise the probe. Five other cases, including the one pertaining to Maharashtra minister Nawab Malik's son-in-law Sameer Khan, have been transferred from the NCB's Mumbai zone to the central zone. Sanjay Singh, the deputy director general of the central unit of the NCB, will now be the supervising officer for all five cases.