Investigators are examining whether TATP, a volatile explosive, was used in the i-20 blast near Red Fort that killed Dr Umar Un Nabi.

Investigators probing the Delhi car blast near Red Fort have uncovered a ₹20 lakh terror funding trail linked to three doctors and a suspected Jaish-e-Mohammed handler who allegedly routed the money through hawala channels.

Investigators looking into the fatal car blast near the Red Fort report that the suspect created a hidden communication network through Threema — a Switzerland-based encrypted messaging platform that is prohibited in India.

Following the November 10 Red Fort blast, authorities have reopened the monument and surrounding areas, including Lal Quila Metro Station. The Red Fort is open to visitors again on November 16.

Aggarwal Agencies is the shop from which the accused purchased five to six packets of fertilisers days before the blast. It is suspected that the accused mixed these fertilisers with chemicals to make explosives.

Investigators say the Delhi Red Fort blast suspects used the Swiss encrypted app Threema to plan and coordinate their activities. Here is a simple explainer on how the app works, why it is hard to trace and why the accused relied on it for secret communication.

A slow-moving Hyundai i20 car exploded in the middle of heavy evening traffic near Delhi's Red Fort last week, killing 13 people. , Delhi News, Times Now

A DNA sample taken from Umar’s mother matched the remains during testing conducted Wednesday at the All India Institute of Medical Sciences (AIIMS), they said.