New Delhi, April 10 (SocialNews.XYZ) Security arrangements have been intensified at the National Investigation Agency (NIA) headquarters and Patiala House Court in the national capital ahead of the arrival of Tahawwur Rana, the key accused in the 26/11 Mumbai terror attacks. Rana, a 64-year-old Pakistan-born Canadian national and a close associate of David Coleman Headley alias Daood Gilani, is being extradited from the United States to face trial in India for his alleged role in the 2008 Mumbai attacks that claimed 166 lives and left hundreds injured.