Delhi police has written to the Jamia Millia Islamia administration to provide CCTV footage from the cameras installed on the outer walls of the university in connection with the ongoing probe into the low-intensity explosion near the Israeli embassy, sources said on Thursday.

The police suspect that one of the persons who visited the blast site at Prithviraj Road a couple of hours prior to the explosion on December 26 had come from Jamia Nagar in southeast Delhi.

“We have written a letter to the university to provide CCTV footage, which will help us in the ongoing probe. Most of the cameras installed on the university's walls are faced towards Okhla Road from where one of the suspects in the blast took an autorickshaw,” a police officer said. He said the accused, who is yet to be identified, is believed to be the prime suspect who could have planted the bomb.

“The unidentified person had taken an autorickshaw near the Jamia Millia Islamia Metro station. After scanning several CCTV cameras from near the explosion site, we have found that the suspect had moved towards India Gate after visiting the spot at Prithviraj Road,” the officer said.

The blast had occurred on an empty plot with lots of bushes on Prithviraj Road around 5.20pm behind the Israeli embassy on Dr A.P.J. Abdul Kalam Road.

Earlier, the Delhi police had said it had identified two persons who were caught on camera walking on the road close to the spot shortly before the low-intensity explosion at the rear side of the embassy. The police had registered an FIR against “unknown” people three days after the incident and said an “abusive” one-page threat letter addressed to the Israel ambassador had been found.