Chandigarh, Nov. 14 -- Investigators probing last week's explosion near Delhi's Red Fort have widened the scope of their operations, detaining two young doctors from Haryana's Nuh district and launching a detailed examination of Al-Falah University's land and administrative records.

Officials associated with the multi-agency probe said the two men, both recently associated with the university's medical wing, were taken into custody after data recovered from their mobile phones flagged "certain suspicious interactions." The findings are still undergoing technical verification, officers clarified.

One of the detainees, identified locally as Mustaqim from Sunheda village, completed his medical studies in China before returning to India for a...