Investigations are on into the January 29 blast, which caused no injury and which police said was probably caused by a “very low-intensity improvised device”.
A letter found at the blast site–a key lead into the probe—is addressed to Israel Ambassador Ron Malka and warns Israel of revenge for the killing of Iran Quds Commander Qassem Soleimani and Iranian nuclear scientist Mohsen Fakhrizadeh, last year.
The DNA and fingerprinting test may help the agencies ascertain the involvement of foreigners, as a needle of suspicion points to Iranian visitors and residents in India. “If any foreigners are involved, we will seek help from our foreign counterparts to identify the handwriting and DNA using their database,” said a senior official monitoring the probe at North Block.
The Delhi Police team examining the CCTV footage of the area outside the embassy in connection with the blast has so far questioned two dozen suspects, but is yet to make a breakthrough in the case.
On Saturday, a team of National Security Guard (NSG) visited the spot and collected evidence, including the circuit, battery and other remnants from the blast. A detailed report on the nature of explosives used in the IED is likely to be submitted by the NSG experts on Monday.
Preliminary forensics examination on Friday revealed use of a beverage tin can with firecracker and ball bearings connected to an electric circuit.
Investigators are also examining the similarity in the improvised explosive device used in the embassy blast and those of the mysterious low-intensity blasts in south Delhi between 2008 and 2009. The series of low-grade explosions in South Delhi used concoction of ammonium nitrate, firecracker powder, and ball-bearings to create panic. Few arrests were made by the local police but the trail went cold.
Another key lead that investigators are looking into relates to Jaish-ul-Hind, a lesser known group which claimed responsibility for the blast on Telegram.
Officials said the blast claim was posted on a social media platform more than an hour before the explosion occurred and cannot be ignored.