CHICAGO (CBS) — A 15-year-old boy was in custody after shooting at least 14 people Tuesday morning at a high school in southwestern Kentucky. Two of the victims died.

Police said the suspect entered Marshall County High School in Benton, Kentucky, shortly before 8 a.m., and soon opened fire with a handgun. The first call to 911 came in two minutes later, and officers arrived on scene five minutes after that.

“The students at that school did exactly as they were trained. The Kentucky State Police has been in this area recently, teaching students and faculty how to respond to an active shooter situation, and everybody in that high school reacted appropriately,” Kentucky State Police Commissioner Richard Sanders said.

Kentucky Gov. Matt Bevin said a 15-year-old girl died at the scene and a 15-year-old boy died at the hospital. Twelve other people suffered gunshot wounds, and five others suffered non-gunshot injuries.

“I beg of you again to respect the fact that these children belong to this community and to specific families in this community, and this is a wound that is going to take a long time to heal,” Bevin said.

A Marshall County deputy arrested the shooter.

Sanders said police expect to charge the teen with murder and attempted murder. Investigators have begun looking into his background and home life.

Bevin lauded the officers who rushed to the scene, saying they prevented the shooter from killing more.

“(They) ensured that this was not a more painful incident than what has occurred,” Bevin said.

Sanders said local, state, and federal law enforcement officials have offered to assist in the case.