**WACO, TX** – In the aftermath of a shooting rampage in Texas by a gunman who was a naturalized citizen from Africa, state Attorney General Ken Paxton says that authorities "have to do a better job vetting people when they come here."

Paxton, who's challenging longtime Sen. John Cornyn for the Republican Senate nomination in Tuesday's primary, was commenting about this weekend's shooting in Austin, Texas, that left three people, including the gunman, dead, and more than a dozen injured.

The suspect,** **identified as Ndiaga Diagne, was a 53-year-old naturalized U.S. citizen who was born in Senegal and lived in Pflugerville, Texas, multiple federal law enforcement sources told Fox News.

Diagne was wearing a sweatshirt that read "Property of Allah" and an undershirt featuring an Iranian flag when he carried out the attack, according to law enforcement sources. And authorities also said they found an Iranian flag and photos of regime leaders in Diagne's apartment.

"There's no system that's perfect.…