Duval County Public Schools confirmed that on Tuesday, Landon Middle School was placed on a precautionary lockdown after a student reported hearing another student saying that he had a gun.

JACKSONVILLE, Fla. - A Jacksonville middle school teacher accused of sexting minors changed his plea to guilty last week and was sentenced to three years in prison. Kristopher Paul Beckstrom, who taught music at Landon Middle School, posed as a 15-year-old boy and exchange sordid photos with children, authorities said. But she thought it odd that he avoided sharing live videos with her and that the photos he shared didn't match his profile picture. Confronted with these suspicions, the other user said, "Erik" told her that he was Kristopher -- a 42-year-old music teacher at Landon Middle School who was married with children, according to the report. The victim told police the other user's description of sounded like her former teacher, too.