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.

While most ISIS-linked attacks have occurred in the Middle East and Europe, individuals connected to the militant Islamic group have planned or carried out attacks in the U.S. The deadliest U.S. attack linked to ISIS was the Pulse nightclub shooting in 2016, where 49 people were killed and another 53 were injured.