September 19, 2016
With New York's Mayor confirming that Saturday night's blast in Manhattan was "an intentional act", investigators are now urgently trying to determine the motivation for the bombing and who might be responsible.
The discovery of a second suspicious device, just a few streets away from the first, could offer vital clues in the ongoing investigation.
Law enforcement sources have confirmed that the second device was contained within a pressure cooker and had wires attached to a mobile phone.
If confirmed that the second device is connected to the first bomb, it should provide valuable forensic evidence, as the device did not detonate and has now been removed for detailed analysis.
As well as examining it for fingerprints and other DNA evidence, investigators might also be able to trace the pressure cooker back to the store it was bought from.
A second confirmed device, just a short distance from the first, would also point to a more co-ordinated style of attack and raise concerns that other devices might still be out there.
Police are examining CCTV and other footage from around the scene of the bomb blast.
One particular sequence of video shows a person at the spot where the bomb detonated, just a short time before the explosion.
