(CNN) -- At least 26 people were killed in Sunday's church shooting in Sutherland Springs, Texas, Gov. Greg Abbott said at a press conference.
Many others were wounded, said Freeman Martin, a regional director with the Texas Department of Public Safety, with victims ranging in age from 5 to 72 years old.
Among the dead is the 14-year-old daughter of the church's pastor, Frank Pomeroy, according to his wife, Sherri Pomeroy, the girl's mother. The couple were traveling out of state when the shooting occurred.
The shooter has been described as a young white male who was dressed in all-black "tactical-type gear" and wearing a ballistic vest, Martin told reporters.
As the suspected shooter left the First Baptist Church, a local resident used a rifle to engage him, Martin said. The shooter then fled the church.
After a brief chase, law enforcement later found the suspect dead of a gunshot wound inside his vehicle. Authorities said they don't know if the wound was self-inflicted or the result of the resident who fired on the suspect, Martin said.
Authorities say many more were injured in attack, which has devastated the small Texas town, described as a place where "everybody knows everybody."
The shooter was killed after a brief chase north into neighboring Guadalupe County, according to Guadalupe County Sheriff's Office spokesman Robert Murphy.
The FBI is responding to the scene of the shooting, according to Michelle Lee, spokeswoman for the FBI's San Antonio field office.
A cashier at a gas station across the street from the church told CNN she heard about 20 shots being fired in quick succession while a church service was underway around 11:30 a.m. local time.
Sutherland Springs is in Wilson County, about 30 miles east of San Antonio.
Wilson County Commissioner Albert Gamez Jr. told CNN that multiple people were killed and numerous people were injured in Sunday's shooting.
"My heart is broken," Gamez said. "We never think where it can happen, and it does happen. It doesn't matter where you're at. In a small community, real quiet and everything, and look at this, what can happen."
A law enforcement source told CNN that a man walked into the church and began shooting about 11:30 a.m. local time. Agents from the San Antonio field office of the Bureau of Alcohol, Tobacco, Firearms and Explosives are en route to the scene, the source said.
A small community, devastated
About 100 family members of victims have gathered inside the Sutherland Springs Community Building next to the church, waiting for news of their loved ones, 26-year-old David Flores told CNN. Local law enforcement, the FBI and the Red Cross are also at the community center.
"My dad saw the gunman run into the church building and then he heard shots and saw people running," Flores told CNN. "People covered in blood and screaming. It was pandemonium everywhere."
"Looking around, it's very sorrowful and the pastors from all the local churches right now are just trying to console everybody," said Flores when asked to describe the scene inside the community center.
"There were several children injured," he said. "I know three, personally, who are in critical condition."
According to the church's website, congregants meet around 9:15 a.m. on Sundays for breakfast before Sunday school and the morning church service at 11 a.m. The sanctuary where the shooting occurred is small, with wooden pews and red carpeting.
Last Sunday, a small praise team led the congregation in a rendition of "Happiness is the Lord," according to a video of the service posted on the church's Facebook page.
Later in the service, Pastor Pomeroy read scripture from Proverbs: "Trust in the Lord with all your heart and lean not on your own understanding."
"Lean on the Lord ... leaning into God is the way we should go," he said, "because God's got it figured out whether we do or not."
Photos on the church's page show happy moments in the lives of parishioners: children playing in an inflatable castle and adults and children dressed in costumes during last week's Fall Festival, held on Halloween.
There will be a vigil tonight at 7 p.m. at the Sutherland Springs post office, according to Debra Morales, a volunteer coordinating relief efforts for victims' family members at the Immediate Family Command Center.
"We have never had this happen before," Morales said. "It's all just very upsetting."
The Connally Memorial Medical Center in nearby Floresville, Texas, received 8 patients with gunshot wounds from the Sutherland Springs church shooting, a statement from the hospital said. Four of those patients were transferred to University Hospital in San Antonio to receive a higher level of care.
One of those patients was in critical condition and needed to be air-lifted.
Three patients were treated at Connally Memorial Medical Center and have been released, the statement said. One patient is in stable condition there.
At least 8 patients are being treated at University Hospital in San Antonio, according to spokeswoman Leni Kirkman, who added the situation is still active and the hospital may receive more patients.
A spokesman for Brooke Army Medical Center also confirmed to CNN that the facility has received patients from the shooting, but the spokesman didn't have a specific number.
Dana Fletcher, who owns a business down sthe road from the church, told CNN's Fredricka Whitfield that Sutherland Springs is a "very small" but "very tight-knit community."
"There's two gas stations, the church, a community center, post office, a Dollar General, a tire shop," she said. "That's about it."
Officials react to the news
"May God be w/ the people of Sutherland Springs, Texas," tweeted President Donald Trump, who is in Japan on his first trip to Asia as president.
Trump has been briefed on the shooting, according to White House Press Secretary Sarah Sanders, and has spoken with Texas Gov. Greg Abbott.
US Senator John Cornyn of Texas called the news "truly heartbreaking" in a tweet Sunday. "Please say a prayer for First Baptist congregation, first responders & the community there," he said.
"While the details of this horrific act are still under investigation, Cecilia and I want to send our sincerest thoughts and prayers to all those who have been affected by this evil act," said Gov. Abbott in a statement Sunday. "I want to thank law enforcement for their response and ask that all Texans pray for the Sutherland Springs community during this time of mourning and loss."
Abbott said later on his Twitter page that he was on his way to meet with officials and the families of victims.