New Delhi, March 20 -- In a key development regarding the 26/11 Mumbai terror attack investigation, a Delhi court at Patiala House has directed the National Investigation Agency (NIA) to expedite the filing of a supplementary chargesheet against Tahawwur Hussain Rana in the larger conspiracy case.

The court has recently asked the agency to make all efforts to complete the filing of the supplementary chargesheet by May 2026. The matter has now been listed for further hearing on April 24.

During the proceedings, the NIA informed the court that it had already obtained the necessary voice samples of Rana, which are expected to play a crucial role in corroborating evidence gathered during the investigation.

The development comes amid an ong...