Delhi/IBNS, Nov. 11 -- Three weeks before the deadly car explosion near Delhi's historic Red Fort, posters backing the Pakistan-based terror outfit Jaish-e-Mohammad (JeM) appeared across Srinagar.

What began as a seemingly isolated incident in Jammu and Kashmir would soon unravel into a chilling case that stretched across Uttar Pradesh, Haryana, and the national capital, uncovering a new form of extremism that police now call a "white collar terror ecosystem."

The investigation has led authorities to three Kashmiri doctors - Dr Adeel Ahmad Rather, Dr Muzammil Shakeel, and Dr Umar Mohammad - whose backgrounds in medicine stand in stark contrast to the violent plot they are accused of being part of.

The blast that shook Delhi

At around ...