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 Sanders' daughter, Vontysha Pittman, said her oldest son sought safety in a classroom with a teacher and other students. He hid under a desk and called his father to tell him what was happening, she said.

"They are both are safe at home but they are broken. We need prayers and not just for us but all the families at Oxford," Sanders said.

Senior Aiden Page told CNN's Cooper that his classroom was in lockdown for an hour and described the entire experience as "insane" as he contemplated whether he would live through the ordeal.

"The very first thing in my head was, 'Is this actually happening? I'm going to text my family, say I love them just in case, if I were to die.' Then when everything calmed down for a second, I was able to catch my breath and rationalize things," he said.