Did gunman behind Austin bar shooting support Iran? What was his motive?

Two people were killed and 14 injured in a shooting outside a beer garden in Austin, Texas; the gunman, Ndiaga Diagne, was shot dead by police. The FBI is investigating the attack as a potential terrorism-related crime, citing evidence such as the shooter's attire and items found in his vehicle. Authorities praised the rapid police response, which likely prevented further casualties; the investigation into the motive is ongoing.