At least two are dead and 19 are injured after a shooting at a Kentucky high school on Tuesday morning (local time).
The shooter opened fired at the Marshall County High School, killing a boy and a girl, both 15 years old.
Media reports students were breaking down fences in their panic to escape after the shooter opened fire.
"I'm distraught from all of it. I couldn't really focus driving home," 17-year-old Greg Rodgers, a student at the school, told NBC News.
"I was shaking a lot driving back to my house. I'm still shaking."
A 15-year-old male student was arrested at the scene and will be charged with murder, says state Governor Matt Bevin.
"It is unbelievable that this would happen in a small, close-knit community like Marshall County," Mr Bevin said in a statement.
"This is a tremendous tragedy and speaks to the heartbreak present in our communities."
The attack is the second school shooting in two days in the US. On Monday (local time) a 15-year-old female student was shot at a school in Texas.