A driver rammed a pickup truck into a crowd of New Orleans revelers early on New Year’s Day, killing 10 people and injuring more than 30 in what the FBI is investigating as an act of terrorism.

The driver was killed in a firefight with police following the attack around 3:15 a.m. Wednesday along Bourbon Street in the city’s bustling French Quarter, the FBI said.

Investigators were combing the French Quarter for potential explosive devices, a law enforcement official told the Associated Press. The official was not authorized to discuss details of the investigation publicly and spoke to the AP on condition of anonymity.

FBI Assistant Special Agent in Charge Alethea Duncan said officials were investigating at least one suspected improvised explosive device at the scene.

At a news conference, New Orleans Mayor LaToya Cantrell described the killings as a “terrorist attack” and the city’s police chief said the act was clearly intentional.

New Orleans Police Commissioner Anne Kirkpatrick said the driver was “hell-bent on creating the carnage and the damage that he did.”

“It was very intentional behavior. This man was trying to run over as many people as he could,” Kirkpatrick said.

After the vehicle stopped, the driver emerged and opened fire on responding officers, police said. Officers returned fire, killing the driver, police said.

Two officers were wounded and are in stable condition, police said. They were in addition to 33 people injured in the actual attack.

The area is known as one of the largest New Year’s Eve destinations.

Crowds in the city were ballooning in anticipation of Wednesday night’s Sugar Bowl college football playoff game between Georgia and Notre Dame at the nearby Superdome. The stadium was on lockdown Wednesday morning, but the game was expected to go on as scheduled.

Hours after the attack, three coroner’s office vans were parked on the corner of Bourbon and Canal streets, cordoned off by police tape with crowds of dazed tourists standing around.