The Delhi Police have reportedly zeroed in on two suspects in connection with the minor explosion near the Israel Embassy on December 26 evening.
According to the police, the two youths were seen on CCTV cameras, roaming near the location before the explosion on Tuesday evening.
The security agencies have collected multiple CCTV footage from the lanes of Abdul Kalam Road and Prithviraj Road.
Security officials who visited the spot said since no remnants of the explosive were found at the spot, the possibility of a "chemical explosion" cannot be ruled out.
No one was injured in the blast but an "abusive" letter addressed to the Israeli ambassador was found near the site, officials said.
The letter is "abusive" in nature. It has been sent to the forensic lab to check for fingerprints, they said.
"It's a one-page letter written in English. It is suspected to be related to some organisation with name 'Sir Allah Resistence', and the words like Zionists, Palestine and Gaza mentioned in the letter," the police said.
The low-intensity blast came at a time when security at the Israel Embassy and other Jewish establishments in Delhi have been stepped up following the conflict in Gaza.
This is the third time in nearly twelve years the Israel Embassy in New Delhi has come under attack.
In February 2012, a motorcyclist had attached a 'sticky bomb' to the car of the wife of the Israeli defence attache to India in Delhi. The bomb explosion had left her, a local employee and two passers-by injured.
In January 2021, a small bomb had exploded near the Israeli embassy in Delhi, damaging nearby cars but causing no injuries.
Following Tuesday's incident, Israel National Security Council issued an advisory for Israelis staying in India, particularly in New Delhi, advising them to avoid visiting crowded places and places that are used by Western or Israeli visitors.
"On December 26, a bomb exploded near the Israeli embassy in New Delhi. It is possible that this is an attack," the Israel National Security Council said.
The council advised the people to "try to avoid going to crowded places (malls, markets) and places identified as being used by Western/Jewish and Israeli elements."
It also called for maintaining more public places, including restaurants, hotels and bars, to avoid externalising Israeli symbols.
"Avoid participating in events with many participants that are not secure," the advisory added.
Moreover, it also asked people to avoid posting trip details on social media networks and posting photos and visit details before the trip and in real time.
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