Emergency personnel quickly rushed to the scene, with some victims evacuated by helicopter.
A man has opened fire in a Baptist church in the USA state of Texas, killing at least 20 people, according to authorities.
The man allegedly opened fire at the First Baptist Church in Sutherland Springs, which is located east of San Antonio.
Sunday's attack comes just a month after the one of the deadliest mass shootings in United States history, when 58-year-old Stephen Paddock killed 59 people and at least 527 others.
Devin Keen, another local officer, said "there were kids involved" in the shooting, including a two-year-old.
Television stations KSAT and KENS report that there are multiple victims and that there is a large police presence at the church in Sutherland Springs, which is 30 miles (48 kilometers) southeast of San Antonio.
Eyewitnesses reported at least 20 shots were fired.
The shooting, which took place at the First Baptist Church in Sutherland Springs, is the second mass shooting in the U.S.in less than two months.
"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".
President Trump says he is "monitoring the situation from Japan".
Agents of the Federal Bureau of Investigation, the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives and other law enforcement agencies were either on the scene or traveling there.
- Police haven't revealed why the shooter targeted the church.