Under Section 156(3) of Cr.P.C., the power of the magistrate is limited to giving direction only to the officer incharge of the police station (which comes under the jurisdiction of the magistrate) to conduct investigation. He cannot direct investigation by CB-CID or CBI to conduct investigation in a case.
In the case of Central Bureau of Investigation, Jaipur v. State of Rajasthan, AIR 2001 SC 668 : (2001) 3 SCC 333 : 2001 Cri LJ 968, the Supreme Court has held that the magisterial power under section 156(3) of Cr.P.C. cannot be stressed beyond directing the officer incharge of the police station to conduct the investigation. (Note: In this case the Supreme Court held that the magistrate had no power to direct investigation by CBI.)