New Delhi, May 26 (TIWN): Saradha Chit Fund Scam: The Central Bureau of Investigation (CBI) has issued a Look Out Notice (LoC) against former Kolkata Police Commissioner and Mamata Banerjee's close aide Rajeev Kumar, in connection with the Saradha Chit Fund case. The agency has sought Kumar's custodial interrogation to prevent him from leaving the country, officials said Sunday.

CBI had alerted all airports and immigration authorities this week to stop Kumar from exiting the country and inform the agency on any of his possible moves, the officials told PTI.

Meanwhile, according to India Today TV, the LOC was issued on May 23. A look out circular is issued to keep a check on a traveller who is wanted by the police. It is mostly used in immigration desks at international borders, including airports. Unless the period is stated, look out circulars have a validity of a year as per a notification by the Ministry of Home Affairs.