Forensic investigations have confirmed that Dr Umar Mohammad masterminded the bomb-making operation. He created a powerful explosive by mixing ammonium nitrate with fuel oil and transformer oil.

The CCTV footage, dated November 10, the day of the blast, shows Dr Umar Nabi walking outside Faiz-e-Ilahi Mosque in the Turkman Gate area of Old Delhi.

US Secretary of State Marco Rubio has said the car explosion near Red Fort is 'clearly a terrorist attack' as he commended India for being 'very measured' and 'very professional' in the way it is investigating the deadly incident.

An explosion in a car on 10 November killed 13 people and injured several others near the Red Fort metro station in Delhi. Investigators have now found parallels with the 2011 Delhi HC bombing.

Red Fort blast confirmed as terror incident. Plot to coincide with Babri Masjid anniversary revealed. PM vows justice. Learn more about the investigation.

The Faridabad module, recently neutralised by the Jammu and Kashmir Police, is suspected to have played a central role in supplying the explosives and planning the attack. Days before the Red Fort blast, security agencies had arrested one Dr Muzzamil Shakeel, from whom 2,900 kilograms of explosive material were seized.

Investigations into the Delhi Red Fort blast reveal it was not a suicide attack but a panic-triggered explosion.