Goa, Nov. 11 -- As the investigation into the blast near Delhi's iconic Red Fort intensifies, authorities have detained three doctors from Faridabad's Al-Falah University. The explosion, which killed nine people and injured over 20, has prompted India's premier anti-terror agency, the National Investigation Agency (NIA), to take over the probe.

Delhi Police Crime Branch officers visited the university, reviewed CCTV footage, and spoke with campus personnel to gather information on the doctors, whose names emerged during the investigation into a large explosives haul in Faridabad.

The detained doctors are Muzammil Shakeel, Umar Mohammed, and Shaheen Shahid. Investigators reported that Muzammil and Umar hail from Kashmir, while Shaheen is...