Nine adolescents were shot early on Sunday, April 23, at an after-prom party in Jasper, Texas, prompting an increased police presence this week at the town's high school, according to officials.

No gunshot wounds were life-threatening, according to a Jasper County Sheriff's Office statement. Jasper is a town of approximately 7,200 residents located 134 miles (215 kilometers) northeast of Houston.

According to the sheriff's office, the victims were transported to two hospitals, which did not disclose the number of gunmen.

"This investigation is ongoing, and people of interest are being questioned," the statement said.

The victims' ages ranged from 15 to 19, according to KBMT-KJAC television news.

Saturday night, the Jasper High School prom, a rite of passage for American secondary schools, was conducted in a church meeting hall, according to the television news.

John Seybold, superintendent of the Jasper Independent School District, promised full cooperation with any law enforcement investigation "to bring these perpetrators to justice."

"This week, there will be a significantly larger law enforcement presence to ensure student safety, as well as counselors available to assist any students who require assistance," Seybold said in a statement reported by local media.

At an Alabama "Sweet 16" birthday celebration in the small town of Dadeville a week ago, four people were shot dead, and 32 were injured. In this incident, five suspects have been charged with murder.

Last year, the US Centers for Disease Control and Prevention reported that firearms had surpassed motor vehicle accidents as the primary cause of death among children and adolescents in the United States.