26 dead, 20 injured in massacre at Texas church

The alleged gunman, a 26-year-old man, is also dead after he allegedly stormed the First Baptist Church in Sutherland Springs and began shooting.
4:16 | 11/06/17

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Transcript for 26 dead, 20 injured in massacre at Texas church
Here we are again. Another week, another mass shooting in America. We have seen them in offices and schools, we've seen them in concerts and movie theaters, Walmarts and Starbucks. This time the killer and his gun entered a 1345u8 church in a small town in Texas. You are looking live at the first Baptist church in Sutherland springs where worshippers were gunned down as you know during a Sunday morning service. Much like this one that was recorded in the church last week, the pastor was out of town yesterday with his wife. But their 14-year-old daughter was one of the victims. The few images we have of the church show just how small it is, really nowhere to hide. Tiny church. Here is what we know right now, at least 26 people killed. 20 injured. The shooter who died after a car chase was 26 years old and served in the air force but was court-martialed for assaulting his wife and child and discharged for bad conduct. One of the questions given that record how did he buy a gun? President trump has ordered the flag to be flown at half-staff until Thursday night to honor the victims. Our team is on the ground with breaking developments overnight. Amy robach starts us off in Sutherland springs. Good morning, Amy. Reporter: Good morning to you, robin. This town about a 30-minute drive from San Antonio is in complete shock and mourning today. This community is a close-knit small community where everyone knows everyone and they are all dealing with an unthinkable loss of life. Nearly every person in this town of about 600 knows someone who was either killed or injured in yesterday's horrific attack at the first Baptist church. All available personnel. Reporter: This morning 26 killed and 20 others wounded in what is now the deadliest shooting in Texas history. We have six ambulances en route. Reporter: According to investigators around 11:20 A.M. Local time the attacker identified by authorities as 26-year-old Devin Patrick Kelley parked his car at this gas station before walking across the street to first Baptist church in Sutherland springs, Texas. He had a face mask on so I don't know -- I couldn't like identify him or anything and he had whatting looked like body armor or a vest on. Reporter: Opening fire outside the church during a morning worship session. He was just shooting the church from the outside. He was going from the face of the church around to the side and kept just unloading. Reporter: Witnesses living nearby say he unloaded at least three clips before making his way inside. He opens the church and goes in and kept hearing gunshots probably two or three clips he unloaded inside. Reporter: You can see how small it is from these photos. Barely any space to hide. The youngest killed just 5 years old. The oldest, 72. As he exited the church a local resident grabbed his rifle and engaged that suspect. Reporter: The armed resident jumping in fellow neighbor Johnnie langendorff's truck and chasing after the suspect who fled by car until the gunman crashed over ten miles away at the wilson/guadeloupe county line. It was crashed and found deceased in the vehicle. At this time we don't know if it was self-inflicted or shot by a local resident. Multiple weapons in the vehicle. Reporter: Officials not yet ready to discuss a motive. ATF and FBI on the scene assisting local law enforcement combing through a small 400-people tight-knit community now in tears. It's another senseless act by a cowardly Is all I can tell you. There is to reason for it but that's the world we live in today. Just thinking about my own kids. It could have been us. Reporter: In a town with two gas stations, a community center and post office the first Baptist church is truly the heart of this community and now as you can see behind me it has been turned into an ongoing crime scene where local and federal authorities are trying to figure out why he chose this sleepy town where neighbors help one another where no one locks their doors and chose a place of worship to commit his heinous ago. So many questions and so much heartbreak. Moments ago I spoke exclusi exclusively with Johnnie

This transcript has been automatically generated and may not be 100% accurate.

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