The gunman who killed three people and wounded more than a dozen others in a mass shooting at a downtown Austin , Texas, bar in March was a “lone actor" and there is no evidence he was supported or directed by a foreign terrorist group, FBI investigators said Thursday.

The agency released a two-page update of its investigation into the attack on Buford's Backyard Beer Garden in the early morning hours of March 1 that ended when gunman, Ndiaga Diagne, was killed by police.

The shooting happened after the United States and Israel launched an attack on Iran . Diagne was wearing clothes with an Iranian flag design and the words “Property of Allah."

Despite lacking direct evidence of a motive for the shooting, investigators said Diagne was likely triggered into violent behavior by the war against Iran, “culminating in a violent, impulsive attack" at the bar, the report said.

Investigators determined Diagne admired Iranian leader Ayatollah Ali Khamenei , who had been killed.…