After mowing down numerous people over a three-block stretch on the famed thoroughfare while firing shots into the crowd, the suspect allegedly got out of the truck wielding an assault rifle and opened fire on police officers, law enforcement officials briefed on the incident told ABC News. Officers returned fire, killing the suspect who was not immediately identified, sources said. At least two police officers were shot and wounded, authorities said.

Explosive devices found in and around the scene on Bourbon Street were apparently found to be viable, multiple law enforcement sources tell ABC News.