Just hours before he rammed a pickup truck through a New Orleans street jammed with New Year’s Eve revellers, the perpetrator’s social media posts indicated he was inspired by the terrorist organisation Islamic State, President Joe Biden said.

Mr Biden, citing FBI information, told reporters that the attacker “posted videos on social media indicating that he was inspired by ISIS, expressing the desire to kill.”

Mr Biden made his remarks to the press on Wednesday following the car ramming attack in New Orleans early on New Year’s Day that killed at least 15 and wounded dozens.

Mr Biden referred to the Islamic State as ISIS, but it is also called IS, and in the Middle East and many other countries, it is known as Daesh.

New Orleans police chief Anne Kirkpatrick said that the driver “was trying to run over as many people as he possibly could.”

She added, “He was hellbent on creating the carnage and the damage that he did.”

Police said the incident occurred at 3:15 a.m. (0915 GMT) in an area known for attracting tens of thousands of visitors during major events.

The perpetrator allegedly engaged in a gunfight with officers, injuring two of them, before being killed in the confrontation.

The suspect has been identified as 42-year-old US-born Shamsud-Din J from Texas, the FBI said, with the incident being treated as an “act of terrorism.”

The outgoing U.S. president stressed that the investigation showed that the perpetrator was a U.S. citizen.

“The FBI has reported to me that the killer was an American citizen, born in Texas,” Mr Biden told reporters. He served in the United States Army on active duty for many years. He also served in the army reserve until a few years ago.”

Mr Biden also repeated investigators’ findings that potential explosive devices were found in the pickup truck, which the man drove into the crowd in New Orleans on New Year’s morning, as well as outside the vehicle.

An Islamic State flag was also found in the vehicle, Mr Biden said, citing the FBI.

Hours after the devastating attack, it remains unclear whether the perpetrator, who was killed after his deadly rampage, had accomplices, U.S. media reported on Wednesday.

According to several media outlets, investigators are examining surveillance footage showing a suspicious group of four people. Initially, it was suspected that they might have placed explosive devices in the affected neighbourhood.

However, shortly afterwards, they were reportedly ruled out as suspects.

Earlier, FBI investigator Alethea Duncan said they did not believe the driver “was solely responsible.”

(dpa/NAN)