Surveillance video: There may be three people involved in planting the Manhatten IED

Police had said the blast in the Chelsea neighborhood of Manhattan appeared to come from inside a large trash bin, and law enforcement sources said they have video of a man dropping something into or next to a dumpster on 23rd Street.

Another video from 27th Street shows a man leaving behind a piece of luggage before two other people come along, take a device out of the bag and walk away with just the suitcase, officials familiar with the investigation said.