The Delhi Police will look into “end-to-end encrypted calls” of active mobile numbers near the Israel Embassy as part of its probe into a low-intensity blast that occurred there on Tuesday night.

Officials probing the case suspect it was a well-orchestrated plan, knowing that no CCTV camera was installed on Prithviraj Road, police sources said on Wednesday. Police have intensified its probe after the blast and have identified two suspects who were caught on camera walking on the road close to the spot shortly before the explosion.

“It is hard to trace end-to-end encrypted calls, but with special investigative techniques and dump of nearby numbers, we can trace who were near and around the area where a low-intensity blast occurred,” said a senior police official who requested anonymity.

Police said that there are several different social media applications that need to be checked and concerned companies will be communicated with.

A low-intensity blast occurred in the area between the boundary walls of the house on plot number 4 -- Nanda’s House -- and the Central Hindi Training Institute on plot number 2A on Prithviraj Road on Tuesday evening. The area has bushes, plants and trees and no CCTV camera, the sources said.

On Wednesday, a team of senior police officers visited the area surrounding the Parliament to investigate if there was any connection between the recent security breach in Lok Sabha and the blast.

The area is behind the Israeli embassy on Dr APJ Abdul Kalam Road, running parallel to Prithviraj Road.The sources said there was no CCTV camera at the location as compared to Dr APJ Abdul Kalam Road where more than a dozen cameras are installed outside and near the embassy.

“Nanda’s House and the Hindi training institute have CCTVs inside their gates,” a source said, adding that cameras are also installed at the entry gates of the other houses.

The footage obtained from these cameras show some people, including two youngsters, roaming in the area, but they are not on the list of suspects yet.

According to the officials, the accused probably wanted to send out a message, without harming anyone. A letter found from the spot has given a grim reminder of the January 2021 blast near the embassy.

Delhi Police have also beefed up security in the national capital and additional security forces were deployed near the border areas to maintain law and order in view of the New Year celebrations and the two incidents. Till Wednesday evening, the Delhi Police had not registered any case as they were trying to ascertain the sequence of events leading up to the incident and the nature of the explosion.

“Areas around the Israel Embassy and Jewish establishments in Delhi have been put under the watch of the security personnel. The local police have been asked to increase the vigil in the national Capital,” an official said.