ISIS flag found at New Orleans truck attack scene; Sugar Bowl postponed

COLUMBIA, Mo. (KMIZ)

The FBI is investigating a New Year's Day truck attack in New Orleans that left several dead as an act of terrorism.

New Orleans TV station WGNO reported 15 people had died by late Wednesday afternoon, citing the local coroner.

"We are deeply saddened by the tragic events that unfolded in the French Quarter," New Orleans Coroner Dwight McKenna wrote in a statement. "Our thoughts and heartfelt condolences are with the victims, their families, and everyone affected. As of now, 15 people are deceased. It will take several days to perform all autopsies. Once we complete the autopsies and talk with the next of kin, we will release the identifications of the victims."

The attack also injured several more. The attacker was killed in a shootout with police.

The FBI has identified the driver as 42-year-old Shamsud-Din Bahar Jabbar, ABC News reported. Several news outlets are reporting that the truck had an ISIS flag on it. Officials said he was a U.S. citizen and an Army veteran.

New Orleans police have reviewed surveillance video that appears to show several people planting potential explosive devices in advance of the vehicle ramming, leading the FBI to conclude the driver of the pickup truck was not “solely responsible” for the attack, law enforcement sources told ABC News.

Investigators are urgently working to identify the individuals who were seen on camera and take them into custody.

The college football Sugar Bowl, set to be played Wednesday in the Superdome, was postponed for 24 hours, officials said at an afternoon news conference. The Sugar Bowl is part of the College Football Playoff. Georgia is set to face Notre Dame.

A Georgia student was among the injured.

"At this point, we have learned that a University of Georgia student was critically injured in the attack and is receiving medical treatment," University of Georgia President Jere Morehead wrote in a statement. "I have spoken to the student’s family and shared my concern, support and well wishes on behalf of the entire UGA community."

Authorities found two improvised explosive devices -- one in the truck and one on Bourbon Street -- after the attack, an FBI official said. The suspect might not have acted alone, according to the FBI. Officials confirmed that an ISIS flag was found at the scene.

Louisiana Gov. Jeff Landry said at the news conference that he will order flags around the state to be displayed at half-staff.

Bollards that usually protect Bourbon Street from vehicles while pedestrians are there were down because they're being replaced, Mayor LaToya Cantrell said.

"Bollards were not up because they are near completion," Cantrell said at the afternoon news conference.

The suspect drove around police vehicles parked to block the street, said New Orleans Police Superintendent Anne Kirkpatrick.

ABC News contributed to this report. Check back for updates to this developing story.