Faridabad/New Delhi, Nov. 15 -- The National Investigation Agency (NIA) and Jammu & Kashmir Police have detained three doctors - all recently associated with Al-Falah University in Faridabad - for questioning in connection with the deadly blast near Delhi's Red Fort, officials aware of the matter said, even as the house of Dr Umar un-Nabi, the driver of the car that exploded, was demolished early Friday.

The deepening probe has brought unprecedented scrutiny to the university, where at least four other doctors linked to the suspected module - including Nabi - were employed. Eleven people died when the car exploded after slowing down for a red light near the historic monument on Monday evening. Officials said the three doctors detained on...