A gunman opened fire in a downtown high school Wednesday before killing himself, and five people were taken to a hospital, authorities said.

Mayor Frank Jackson said three teens and two adults were hurt. He said the children were in “stable, good condition,” and the adults were in “a little elevated condition.”

Police said SuccessTech Academy had been secured and that the lone suspect had fatally shot himself. Students said he was enrolled at the alternative school but did not attend class Wednesday.

This provides yet another example of why teachers should be allowed to carry guns. The problem with “Gun Free Zones” is that only the killer gets to carry a gun.