March 2 (UPI) -- The FBI is actively looking into whether the suspect in Sunday's mass shooting at a bar in Austin that killed two people and injured 14 was motivated by the strikes launched against Iran by the United States over the weekend.

The agency was pursuing the line of investigation because Ndiaga Diagne, who was shot dead at the scene by Austin police department officers, was wearing a hoodie that read "Property of Allah" and a T-shirt with an Iranian flag on it, two people with knowledge of the investigation told The Washington Post.

Officers also found a Quran in the SUV that Diagne, a 53-year-old Senegal-born naturalized U.S. citizen, used to drive to Buford's Backyard Beer Garden in the city's Sixth Street nightlife district.

The FBI confirmed it was treating the shooting as potential terrorism and had brought in its Joint Terrorism Task Force to help in the investigation.

"Obviously, it's still way too early in the process to determine the exact motivation. But there were indicators on the subject and in his vehicle that indicate a potential nexus to terrorism," Alex Doran, acting head of the FBI's San Antonio field office, said at a news briefing on Sunday.