Officials familiar with the investigation tell NBC News that all devices had old, flip-style cell phone as possible detonators, raising concerns that the New Jersey and Manhattan events could be linked. Those officials also say that at least one surveillance video from 27th Street in Manhattan shows a man leaving a piece of luggage on the sidewalk, and then two other men come and dump the contents of the suitcase and take the empty suitcase. The officials say police are seeking the men, who likely did not know the bag might contain a device, to confirm what they found.