There is a heavy police presence at Lake Brantley High School in Seminole County.
According to a tweet by the school, the campus was put on a "Code Red" lockdown around 8:30 this morning because of a threat on social.
Altamonte Springs police and Seminole County deputies have set up a perimeter around the school and nearby Forest City Elementary.
The school is in touch with parents and posting updates on social media.
Image courtesy Getty