New Delhi, April 11 -- Tahawwur Hussain Rana, a key accused in the 2008 Mumbai attacks, was brought back to India on Thursday , ending a 16-year-long wait to prosecute one of the planners of the deadliest terror strike in India that killed 166 people and injured 238 others.

Officials from National Investigation Agency (NIA) and the National Security Guard escorted Rana to New Delhi from the US.

Investigators will now question Rana in their attempt to zero in on his conspiracy with terrorist organisations Lashkar-e-Taiba (LeT) and Harkat-ul-Jihadi Islami (HUJI), the role of the Inter Services Intelligence (ISI), the Pakistani army, and other conspirators behind the deadly strike that shook Mumbai and changed how India fought terror.

"Th...