SUTHERLAND SPRINGS, Texas — A man opened fire inside of a church in a small South Texas community on Sunday, killing more than 20 people and wounding at least 10 others before being killed or killing himself, authorities said.

The exact number of victims in the attack at the First Baptist Church in Sutherland Springs wasn’t immediately known. But a law enforcement official who was briefed on the investigation told The Associated Press that more than 20 people were killed and between 10 and 15 others were wounded, though the official stressed that the investigation was in its early stages and the figures could change.

Carrie Matula embraces a woman after a fatal shooting at the First Baptist Church in Sutherland Springs, Texas, on Sunday, Nov. 5, 2017. Matula said she heard the shooting from the gas station where she works a block away. [Nick Wagner | Austin American-Statesman via AP]
Carrie Matula embraces a woman after a fatal shooting at the First Baptist Church in Sutherland Springs, Texas, on Sunday, Nov. 5, 2017. Matula said she heard the shooting from the gas station where she works a block away. [Nick Wagner | Austin American-Statesman via AP]
A woman prays with a man after a fatal shooting at the First Baptist Church in Sutherland Springs, Texas, on Sunday, Nov. 5, 2017. [Nick Wagner |Austin American-Statesman via AP]
A woman prays with a man after a fatal shooting at the First Baptist Church in Sutherland Springs, Texas, on Sunday, Nov. 5, 2017. [Nick Wagner |Austin American-Statesman via AP]
Law enforcement officers man a barricade near the First Baptist Church of Sutherland Springs after a fatal shooting, Sunday, Nov. 5, 2017, in Sutherland Springs, Texas. [Darren Abate | Associated Press]
Law enforcement officers man a barricade near the First Baptist Church of Sutherland Springs after a fatal shooting, Sunday, Nov. 5, 2017, in Sutherland Springs, Texas. [Darren Abate | Associated Press]
Law enforcement officers work in front of the First Baptist Church of Sutherland Springs after a fatal shooting, Sunday, Nov. 5, 2017, in Sutherland Springs, Texas. [Darren Abate | Associated Press]
Law enforcement officers work in front of the First Baptist Church of Sutherland Springs after a fatal shooting, Sunday, Nov. 5, 2017, in Sutherland Springs, Texas. [Darren Abate | Associated Press]