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.The official said the gunman fled in a vehicle after the attack and was killed, either by a self-inflicted wound or during a confrontation with police. The official was not authorized to discuss the ongoing investigation and spoke to the AP on the condition of anonymity.Federal law enforcement swarmed the small community 30 miles southeast of San Antonio after the attack to offer assistance, including ATF investigators and members of the FBI’s evidence collection team.Among those killed was the 14-year-old daughter of the church’s pastor and his wife. Sherri Pomeroy said in a text message to the AP that she and her husband were out of town when the attack occurred, but they lost their daughter “and many friends.” She said she and her husband, Frank Pomeroy, were trying to get home. The text was in response to an interview request sent to a phone number linked in online records to her husband, pastor Frank Pomeroy.