In pictures: New Orleans reels after deadly terror attack
At least 15 people are dead after a vehicle was driven into crowds celebrating New Year in New Orleans in the US.
The attacker, Shamsud-Din Jabbar, 42, crashed a white ute into a crowd of revellers on Bourbon Street in the party city's famous French Quarter.
Some of the victims have now been named.
Images show how the horror unfolded, as officials piece together the deadly attack.
FBI agents work to gather evidence from the early morning attack on Bourbon street near the Four Points by Sheraton hotel in the French Quarter.
Jabbar, 42, a US citizen and army veteran from Texas, had an ISIS flag and multiple explosives in the ute, authorities said.
Locals gather to see what happened after the vehicle drove into a crowd on New Orleans' Canal and Bourbon Street.
Investigators also have found writings that the FBI believes support investigators' view that the attack was inspired by ISIS, sources told CNN.
CNN also reported that multiple officials confirmed law enforcement were reviewing video recordings believed to have been made by Jabbar.
Members of the FBI apply crime scene tape near a bar on Bourbon Street.
Emergency service vehicles form a security barrier to keep people out.
At about 3.15am local time (8.15pm AEDT), Jabbar drove the ute down Bourbon Street "at a very fast pace" and also fired on police officers, Superintendent Anne Kirkpatrick said.
After the vehicle came to a stop, Jabbar emerged from the ute and opened fire on responding officers, New Orleans police said.
Officers returned fire, striking and killing the driver, police said.
Two officers were shot and are in stable condition, police said.
Former mayoral candidate Edward Bruski hugs New Orleans police officer Zachary Stevenson after the shock attack.
The city's emergency preparedness agency, NOLA Ready, told people to stay away from the area.
It was a sentiment echoed by Governor Jeff Landry who said on X that authorities face "a fluid situation" as they investigate.
Bourbon Street is known worldwide as one of the largest destinations for New Year's Eve parties.
Crowds in the city were ballooning in anticipation for the Sugar Bowl college football playoff game at the nearby Superdome later in the day, with thousands expected to be in attendance.
The game has now been postponed for 24 hours in the interests of public safety.
Bourbon Street has had barriers to prevent vehicle attacks since 2017, but the rampage happened amid a major project to remove and replace the devices, which left the area vulnerable.
Jabbar was killed when he got out of the car and exchanged gunfire with police.
The attack was declared an act of terror.
Investigators found an ISIS flag and several weapons, including explosive devices, in Jabbar's ute.
Jimmy Cothran, a New Orleans resident of 15 years described the harrowing aftermath he witnessed from a nearby nightclub balcony.
"When we got up there … it was just unimaginable casualty," he said of his view from the balcony.
Prime Minister Anthony Albanese issued a statement on X condemning the "appalling" attack.
"All Australians are appalled by the attack in New Orleans, a shocking act of violence aimed at people celebrating the new year together," he wrote.
"Our first thoughts in this moment are with the victims and their loved ones. Our nation stands with the people of the United States."
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