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 Friday were believed to have been in frequent contact with Nabi. According to senior police officers, the detainees have been identified as Dr Mushtakeem, a resident of Sunhera village in Ferozepur Jhirka who returned from China after completing his MBBS and was interning at Al-Falah Medical College; Dr Mohammad, from Ahmadbas village; and Dr Rehaan Hayat, who now works at a private hospital in Tauru after completing his MBBS at Al-Falah. "Their names surfaced during interrogation of the arrested suspects, and call detail records showed frequent contact with Dr Umar and Dr Muzammil," an NIA officer said. Investigators also confirmed that members of the module communicated using draft messages saved in a shared email account - a method that leaves no transmitted messages and is harder to trace. They also used encrypted apps such as Signal and Threema. Delhi Police officers assisting the NIA said scrutiny of Al-Falah University has intensified because three of its doctors - Umar, Muzammil, and Dr Shaheen Shahid - have already been arrested or named in the investigation....