India, Nov. 12 -- Described by his family as "quiet and studious," 35-year-old Umar un-Nabi from Jammu and Kashmir, has emerged as a key suspect in the high-intensity blast case near Red Fort that left the national capital and the nation stunned.

A doctor by profession, Umar is believed to be the one driving the Hyundai i20 car that exploded near the Lal Quila metro station in Delhi on Monday, killing at least 10 people and injuring several others.

He is allegedly also tied to the massive raids in Faridabad a few days back that led to the recovery of nearly 3,000kg of ammonium nitrate. The operation, led by security agencies, unearthed a "white-collar terror network" and led to the arrest of seven people, including two doctors.

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