The shooting took place at the First Baptist Church in Sutherland Springs, southeast of San Antonio, reports said.
They said the shooter walked into the church shortly before noon and opened fire. A two-year-old was among the wounded, the Dallas Morning Newswebsite reported.
There were “multiple fatalities and multiple wounded,” according to Wilson County Commissioner Albert Gamez Jr., NBC News reported.
A spokeswoman for Connally Memorial Medical Center in nearby Floresville told Fox News that “we have accepted a number of patients from the shooting.” She, however, gave no number.
Helicopters and emergency personnel were arriving at the scene, and agents of the Bureau of Alcohol, Tobacco, Firearms and Explosives were heading to the scene, the bureau said.