Gardaí examine CCTV footage from bomb hoax site
Officers are hopeful of making progress, but have not yet identified the suspect, sources said.
An emergency operation had to be put in place after the call, involving the evacuation of hundreds of people from the Leixlip plant, an extensive search operation and a hunt for the caller.
No devices were found at the 24-hour facility.
The man made two anonymous 999 calls from a public phone box at 6.20am saying there were 12 explosive devices at Intel and then mentioned the Islamic State.
Garda Command and Control, which deals with 999 calls, has a database of public phone boxes and was immediately able to pinpoint the location — a box in Balbriggan, north Dublin.
As orders were made to Intel to evacuate, officers at Balbriggan Garda Station were dispatched to the phone box. While the caller was gone, they secured the phone box for forensic examination. DNA and forensic samples were taken from inside the box, including the phone handle and mouthpiece, as well as the door.
Detectives are hopeful that given the early hour no one used the phone subsequently and that DNA, fingerprint or fibre evidence may have been left behind.
Sources said they were gathering CCTV from around the phone box, which would be examined.
Again, due to the early hour, there may not have been many people around, limiting the number of possible suspects.
A garda source said the suspect had not yet been identified.
Investigators also listened to the recording for further clues as to the age and accent of the caller.
Senior gardaí are eager to determine as quickly as possible whether the call was a juvenile prank, a real threat from an Islamic extremist, the work of a disgruntled former or current employee, or a malicious attempt to stir up hostility towards the Muslim community.
Gardaí would not reveal many details of their investigation yesterday, but said they were making progress
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