Authorities say the gunman who opened fire in a Texas church had sent threatening text messages to his mother-in-law, who attended the church.

Texas Department of Public Safety Regional Director Freeman Martin said Monday that the mass shooting stemmed from a domestic situation and was not racially or religiously motivated.

Authorities say that evidence at the scene leads them to believe that Devin Patrick Kelley died of a self-inflicted gunshot wound after he crashed his car. He had been chased by armed bystanders.

They say Kelley also used his cellphone to tell his father that he had been shot and didn't think he would survive.

Officials say that the 26 people killed in a shooting at a small South Texas church range in age from 18 months to 77 years old.

Freeman Martin, a regional director of the Texas Department of Safety, said Monday that 20 were injured in the shooting Sunday morning at the church in Sutherland Springs. Martin says 10 people were still hospitalized in critical condition.

Martin said those treated in hospitals ranged in age from 5 to 73.

The special agent in charge of the Bureau of Alcohol, Tobacco, Firearms and Explosives field office in Houston says three guns have been recovered from the suspect in the deadly church shootings in Texas.

Fred Milanowski said during a news conference Monday that officers recovered a Ruger AR-556 rifle at the church.

Milanowski said two additional handguns were recovered from the vehicle driven by Devin Patrick Kelley — a Glock 9mm and a Ruger .22-caliber. Milanowski says all three weapons were purchased by the now-deceased suspect.

Freeman Martin with the Texas Department of Public Safety said Kelley did not have a license to carry a concealed handgun. He says he did have a "noncommissioned, unarmed private security license similar to a security guard at a concert-type situation."