New Delhi, April 12 -- A Delhi court on Friday granted the National Investigation Agency (NIA) 18 days of custodial interrogation of Tahawwur Hussain Rana, a key accused in the 2008 Mumbai attacks, emphasising the importance of providing NIA with a "fair chance to thoroughly investigate the matter".

Special NIA judge Chander Jit Singh, while allowing NIA's plea early on Friday, also noted satisfaction that the agency presented "enough material" reflecting a prima facie case and the "potential role of accused".

According to NIA, Rana conspired with his childhood friend David Coleman Headley, who was convicted in the US for his role in the attacks, to conduct reconnaissance of targets in Mumbai. Furthermore, the agency said Rana was involve...