SRINAGAR, Nov. 14 -- What began as an investigation into a few threatening posters pasted in Srinagar's Nowgam area last month has led the Jammu and Kashmir Police to uncover a sophisticated, interstate terror network linked to the Pakistan-based Jaish-e-Mohammad (JeM).

The probe, which started after the appearance of inflammatory posters in Bunpora, Nowgam, has exposed what investigators describe as a "white-collar" terror ecosystem - a network of radicalised professionals and students allegedly coordinating with handlers across the border.

On the morning of October 19, residents of Bunpora woke up to find walls plastered with posters carrying the Jaish-e-Mohammad insignia and threats against police and security personnel.

The posters...