New Orleans attack latest: No evidence at this time suspect had contact with ISIS, officials say

New Orleans police are conducting a grid search of the French Quarter for any possible additional IEDs, New Orleans Parish District Attorney Jason Williams told ABC News.

This, after explosive devices discovered in and around the scene on Bourbon Street were apparently found to be viable, multiple law enforcement sources also tell ABC News. Several controlled detonations have taken place, ABC News Aaron Katersky reported.

Officers are looking into parked cars, trash cans and along every nook and cranny, Williams said.

Authorities are also working to determine whether the deceased suspect had help with a three-pronged attack involving a vehicle ramming, gunfire and improvised explosives, according to the DA.

Attorney General Merrick Garland said the FBI is investigating this matter as an act of terrorism.

President-elect Donald Trump released a statement on the New Orleans attack calling it an "act of pure evil."

"Our hearts are with all of the innocent victims and their loved ones, including the brave officers of the New Orleans Police Department," Trump wrote.

He then indicated his administration will support the City of New Orleans with the investigation.

Vice President-elect JD Vance also reacted on social media.

"Heartbreaking violence last night in New Orleans. Such a beautiful and great American city. May God bless the victims and their families."

Witnesses described scenes of carnage in the wake of an attack early Wednesday morning on Bourbon Street in New Orleans that left 10 killed and 30 injured.

"We heard a 'pop, pop, pop, pop' sound, followed by a sound that sounded like fireworks going off, like a big firework all at once, and it turned out that was the crash," said Paul S., who asked ABC News to withhold his full name.

Paul said he peeked through the curtains to see what was occurring and saw police officers telling people in buildings to stay inside. He then went onto the balcony and started recording the aftermath of the attack.

Viewer Discretion Advised: Some descriptions may be graphic

"There's litter all over the sidewalks, and then there were bodies laid up next to garbage cans and people rushing to give aid," he said. "There were...these really bright lights out on Bourbon Street and that illuminated the scene where you could look up and down a block and see it completely empty except for the bodies that were on the ground."

Another witness, Jimmy Cothran, told ABC News' Morgan Norwood he and his group ducked into a Bourbon Street nightclub when the commotion began.

"Body after body mangled just as far as you could see. We counted 10, and at least six were instantly clearly deceased. Some were very clearly deceased, but others were yelling out. ... It's a lot to process," he said.

Cothran added that he saw some bodies in the street that bore tire marks.

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New Orleans officials are investigating the identity of the suspect.

They said they have identified a name -- albeit a common name -- so authorities say they want to be certain that they have identified the right person before releasing a name.

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.

Police Superintendent Anne Kirkpatrick said the driver had attempted to kill as many people as possible. The truck used in the attack appeared to be a F-150 Lightning, an electric vehicle. A black flag appeared to be attached to the vehicle, but its significance was not immediately known.

"He was hellbent on creating the carnage that he did," Kirkpatrick said at a news conference early Wednesday.