A National Investigation Agency (NIA) team will visit Faridabad to take over the probe from the local police into the discovery of nearly 2,900kg of ammonium nitrate and other explosive material and firearms linked to the explosion outside Delhi’s Red Fort on Tuesday. The material and arms were recovered from the rented premises linked to two accused doctors, Muzammil Ahmad and Umar Un Nabi.
The house where the explosive material was recovered. (HT PHOTO)
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Faridabad Police have sealed the biochemistry laboratory and a toilet block at Al-Falah Medical College, where Nabi worked, after forensic teams found traces of suspected ammonium nitrate-based compounds from benches and storage racks.
The accused is suspected of having siphoned off small quantities of ammonium compounds and oxidizers from the college’s labs over weeks before combining and storing them in Faridabad’s Dhauj, and Fatehpur Taga.
“Forensic experts have lifted traces of substances from lab benches and storage racks that match preliminary indicators of ammonium nitrate-based compounds,” a police officer said. “We suspect the accused tested chemical reactions in controlled amounts before scaling up their operation outside the campus.”
The collected samples have been sent to the State Forensic Science Laboratory in Madhuban for analysis.
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A senior police officer, who asked not to be named, said: “We are verifying if the accused diverted any materials from the college lab inventory for assembling explosive components. The findings of the forensic report will be crucial to establishing this link.”
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A senior police officer, who asked not to be named, said: “We are verifying if the accused diverted any materials from the college lab inventory for assembling explosive components. The findings of the forensic report will be crucial to establishing this link.”
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A Jammu and Kashmir Police team in Faridabad is coordinating with forensic experts via video calls, comparing samples from Srinagar with those recovered here to determine any chemical and operational linkage.
Police have seized over a dozen vials, glass flasks, and sealed containers from the college lab. Attendance logs of staff and students with lab access are being scrutinised.
Faridabad Police commissioner Satendra Kumar Gupta visited the medical college late Tuesday to assess the situation, even as media have been barred from entering the campus amid heightened security.
Leena Dhankhar is Senior Editor and Bureau Chief, Gurugram, at Hindustan Times, where she has spent over 17 years chronicling the transformation of one of India's fastest-growing urban regions. From starting her career as a crime reporter to leading the Gurugram bureau, her journalism has been defined by investigative reporting, in-depth storytelling and an unwavering focus on public interest.
Over nearly two decades, she has reported extensively across crime, politics, civic governance, elections, real estate, environment, courts, sports, education and entertainment, covering Gurugram, Faridabad, Nuh and Palwal. Her reporting has exposed several major scams and systemic failures, including insurance frauds, waste management irregularities, illegal arms manufacturing units in Nuh, illegal mining in the Aravallis, organised crime networks and governance lapses affecting millions of residents.
Known for her investigative work and exclusive stories, Leena has reported on high-impact national issues, including the Nicaragua charter flight carrying Indian migrants that was turned back amid allegations of human trafficking, exposing the growing network of illegal immigration rackets. Her work has also focused on gang wars, prison administration, juvenile crime, women and child protection systems, the functioning of the Juvenile Justice Board and Child Welfare Committee, and environmental challenges such as pollution, waterlogging and deteriorating civic infrastructure.
Beyond hard news, Leena has extensively documented Haryana's rich heritage, forests and wildlife, bringing attention to the state's historical landmarks, biodiversity, conservation efforts and ecological challenges through immersive reportage and feature writing.
Her journalism has consistently gone beyond breaking news. She has documented Gurugram's rapid urbanisation through long-form narratives and enterprise reporting on issues ranging from pothole-ridden roads, flooding and waste management to the changing social fabric of India's Millennium City. She also writes widely read feature columns, including The Outsider, Changemaker, and Concern for Gurugram, profiling people, places and ideas shaping the city's identity.
Leena is the author of Gurugram School Murder, published by Juggernaut Books, a deeply reported account of one of India's most high-profile school murder investigations. She is currently working on her second book, an investigative work exploring some of India's most significant scams and fraud investigations.
Beyond print journalism, she has expanded her storytelling through public speaking and digital media. She is a TEDx speaker and has produced podcasts exploring Gurugram's transformation, civic challenges and untold stories. Her work reflects a commitment to narrative journalism that combines rigorous reporting with compelling storytelling.
A law graduate with an MBA in Human Resources, Leena brings a multidisciplinary perspective to her reporting, particularly on governance, public policy and legal affairs. She has travelled extensively across India to pursue investigative assignments, often reporting from remote locations and conflict-prone areas in search of stories that matter.
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