India, Nov. 14 -- Investigators tracking the origins of the explosives used in Monday's deadly blast near Delhi's Red Fort have traced the procurement network to Basai Meo village in Haryana's Nuh district and adjoining areas of Faridabad, Gurugram, and Saharanpur. The findings, officials said, reveal a complex chain of fertilizer and ammonium nitrate purchases allegedly orchestrated by Dr Umar Un Nabi and his associates from the Faridabad module over the past several months.

People familiar with the investigation said Umar and another suspect had posed as farmhouse owners while approaching fertilizer shops in Nuh, where they began purchasing NPK fertilizers in small quantities over the last three-four months. Senior officers said the mo...