McDermott, OH (WSAZ) -- At the top of the forbidden carry zones for concealed weapons -- schools.

One man is recovering Thursday from a gunshot he received inside a middle school. Recovery is just the beginning of his problems, though, which may end in prison time.

Northwest Schools Superintendent Todd Jenkins says late afternoon Tuesday, a middle school student was in the gym shooting basketball, waiting on practice to start. Jenkins says the student's grandfather showed up to bring the student some food.

Jenkins said the grandfather shot some hoops too, with a loaded handgun in his pocket.

"The pistol fell out of his pocket, hit the floor, fired -- and shot through his leg," Jenkins said.

The grandfather was rushed to the hospital with a serious leg injury.

"We don't know if he just forgot or disregarded the gun in his pocket," Chief Deputy Todd Miller of the Scioto County Sheriff's Department said.

Sheriff's investigators say the 70-year-old man walked in the school's back door, past the "No Concealed Guns in School" sign. They say he had the proper conceal carry permit, but maybe he didn't have the understanding to carry the gun safely.

"A properly concealed weapon should not go off if dropped," said Miller.

"We're lucky that there were not other students in the gym," said Jenkins.

Superintendent Jenkins says he knows hunters come to Friday night school games with deer rifles in their trucks. He says that is a felony.

There was no arrest in the case of this grandfather, but deputies and prosecutors are meeting on what the exact gun crime charge might be.

Folks may carry a legal concealed weapon on school property if they are moving through, picking up or dropping off a student.