The attacker who killed 14 pedestrians on Bourbon Street was “influenced by the discourse and messaging of the Islamic State,” the terrorist group said in a bulletin dated Thursday.

The attack on Bourbon Street "struck me as being particularly reminiscent of ISIS advice,” said Joshua Fisher-Birch, a researcher at the Counter Extremism Project.

It is the deadliest attack by ISIS on the West in several years. But still, almost a week later, the group also known as Islamic State has yet to issue its trademark claim of responsibility for the horrific New Year’s violence in New Orleans.

Before Shamsud-Din Jabbar attacked Bourbon Street in New Orleans, the FBI says he researched the city, reading up on recent shootings and a vehicle attack in Germany.

The New Year's Day attack injured 57 people, the FBI said Tuesday, increasing its latest count from 35. The latest: The suspect's internet history, the FBI said in its update, also revealed that he had researched Mardi Gras,

The FBI is revealing new details in their investigation as they try to determine what motivated a Houston man to drive his car into a crowd in New Orleans, killing 14 people and injuring 57 others on New Year's Day.