A special court here on Tuesday extended till April 7 the NIA custody of a suspended policeman and a bookie in connection with the agency's probe into the murder of businessman Mansukh Hiran.

Hiran, a Thane resident, was in possession of an SUV which was later found with explosives near the residence of industrialist Mukesh Ambani in south Mumbai on February 25. The body of Hiran was found in the Mumbra creek in Thane on March 5.