An FBI official said Wednesday afternoon that investigators do not believe that the man who drove into a New Orleans crowd was "solely responsible" for the crime. The coroner's office reported that the death toll in the attack has reached at least 15, per CNN. Officials said three men and a woman seen on video are no longer suspected of planting explosive devices in the French Quarter, but officials are looking for accomplices. The Sugar Bowl, which officials had said would still be played Wednesday evening at the nearby Superdome, instead has been postponed a day. Federal, state, and local officials held a news conference in which they addressed the attack and the investigation. Developments include: