Investigators are working to understand the exact reason a man with a rifle crashed into a Michigan synagogue in what federal officials say was an attack carried out by a naturalized citizen born in Lebanon.

Department of Homeland Security sources told Local 4 that 41-year-old Ayman Mohamad Ghazali, a naturalized U.S. citizen born in Lebanon, was identified as the man who drove a truck into Temple Israel in West Bloomfield.