Federal and state officials told reporters in New Orleans on Wednesday afternoon that they are investigating multiple suspects in the attack on Bourbon Street during New Year’s Eve celebrations that killed at least 15 people and injured dozens more.

Shamsud Din Jabbar, 42, an Army veteran, drove into a crowd on the pedestrian thoroughfare in the heart of New Orleans at approximately 3:15 a.m. local time on New Year’s Day. After crashing his pickup truck, he began to shoot into the crowd.