The Nassau County Sheriff’s Office has arrested an 11-year-old student on two felony charges: written threats to kill and disturbing lawful assembly with a credible threat.

Landrum Middle School was placed on hard lockdown Monday morning after staff received a call from someone claiming he was going to conduct a school shooting.

Fletcher High School students in Neptune Beach will notice extra security on Thursday after police were notified about a threat made toward the school on social media.

The campus at Lake Shore Middle School was on a temporary Code Red lockdown Thursday morning after a bus driver reported seeing a suspicious person with a weapon approach the school.