CLEVELAND -- Two incidents involving weapons at a Cleveland High School had students on edge Thursday.

Police said a teenager was caught with a gun inside a classroom at Glenville High School around 9:30 a.m.

A teacher alerted security and the gun, which was loaded, was confiscated, police said. The teen was arrested for carrying a concealed weapon.

During the afternoon, police received a report of a gunman being inside the school. Students were confined to their classrooms as authorities swept the building, but no gunman or weapon was found.