Investigators believe the suspect in the deadly mass shooting inside the small South Texas church suffered a self- inflicted gunshot wound.
The gunman opened fire at the First Baptist Church in Sutherland Springs yesterday, killing 26 people and wounding about 20 others, officials said. Texas officials confirmed the suspect as 26-year-old Devin Patrick Kelley.
The victims ranged in age from 5 to 72, and among the dead were 12 to 14 children, Wilson County Sheriff Joe Tackitt told reporters. Twenty other people were also injured in the attack.
A pregnant woman and the pastor's 14-year-old daughter were among the dead.
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Police have identified all but one of the deceased.
Nearly everyone in the church at the time of the shooting had some type of injury, the Sheriff said.
Texas Governor Greg Abbott called the slaughter "the largest mass shooting" in the state's history and ordered flags across the state to fly at half-staff.
Authorities confirmed that the church shooter was a heavily-armed white male, in his 20s, but refused to name him. But the media identified the gunman as Kelley, who was discharged from the US Air Force in 2014.
Police said the gunman crossed the street in his vehicle, got out and began firing from his rifle. He then moved to the right side of the church, continuing to fire and then into the building.
He was found dead inside the vehicle, although authorities are not sure if the shooter died from a self- inflicted wound, or whether it was from the resident.
"The exact circumstances of the gunman's death are still under investigation," the Texas Department of Public Safety said.
The San Antonio FBI branch said there was no indication of the gunman's motive. But investigators say Kelley's in-laws attended the church at times but were not at the service yesterday morning. It's not clear if he targeted the church, nearly 48 kms from San Antonio, because of this connection.
The US officials said the suspect lived in a San Antonio suburb and does not appear to be linked to organised terrorist groups. The officials said investigators are looking at social media posts Kelley may have made in the days before the attack.
Kelley was previously a member of the US Air Force and served at Holloman Air Force Base in New Mexico from 2010 until his discharge, according to Air Force spokeswoman Ann Stefanek.
President Donald Trump, who is in Japan on the first leg of a 12-day Asia tour, expressed condolences to the victims of the mass shooting and also called Governor Abbott.
He condemned the shooting as an "act of evil" and said Americans would pull together.
"And through the tears and through the sadness, we stand strong, oh so strong," he said but dismissed the need for guns control.
"Preliminary reports show a very deranged individual who's been having a problem for a very long time," he said, adding that "We have a lot of mental health problems in our country."
The shooting has devastated the small Texas town in the east of San Antonio, described as a place where "everybody knows everybody" and sent shockwaves across the US, as the nation confronts a breaking point over race and gun violence.
Less than a thousand people live in Sutherland Springs and officials believe that the number of people who are injured and killed make up about four per cent of the entire population.
It's the deadliest mass shooting in Texas history -- and the fifth deadliest in modern US history.
The shooting comes just a month after a gunman in Las Vegas opened fire on an outdoor music festival, killing 58 people in the deadliest mass shooting in recent US history.
Texas witnessed its worst shooting in 1991 when a man drove his pickup truck into a cafeteria and opened fire, killing 23 people.