Nikyra Cheyenne Dedeaux traveled to New Orleans from Gulfport with her cousin and a friend on Tuesday to ring in the New Year on Bourbon Street. But her grieving mother confirmed Wednesday that Dedeaux, 18, was one of the 10 people killed when a man drove a truck down the crowded French Quarter Street in a suspected act of terrorism.

NEW ORLEANS — A U.S. Army veteran who drove a pickup truck into a crowd of New Year’s revelers in New Orleans, killing 15 people, had posted videos to social media hours before the carnage saying he was inspired by the Islamic State group and expressing a desire to kill, the president said.