Under Section 167 of Cr.P.C, if investigation cannot be completed within 24 hours, the accused can be detained further with the order of a Magistrate for up to ______?

Under Section 167 of the Cr.P.C., when an investigation cannot be completed within the initial 24 hours of arrest, the accused may be produced before a Magistrate. The Magistrate may authorize further detention, subject to legal limits, for a period up to 15 days. This provision ensures that detention beyond the initial period occurs only with judicial oversight and prevents unlawful or indefinite custody during investigations.