Mandarin High School student arrested after making threat to shoot up school, DCPS says

A Mandarin High School student was arrested Friday morning after posting an online threat showing a gun and warning students not to come to school, according to Duval County school district officials. The arrest came after school administrators were alerted to the threatening social media post through Fortify Florida, a suspicious activity reporting app. The threat was posted Thursday night, prompting immediate investigation and communication with parents.