UPDATE: Lockdown lifted at Osceola County middle school, officials say

Horizon Middle School in Osceola County was placed on lockdown Wednesday morning.

The Osceola County Sheriff's Office in Florida began an investigation at Horizon Middle School involving students who reportedly created a list of who would be "safe" during an unknown event.

By James Tutten

OSCEOLA COUNTY, Fla. — A middle school in Osceola County was placed on a lockdown on Wednesday morning over a violent threat, officials said.

11 a.m. update:

Osceola school officials confirmed the lockdown has been lifted at Horizon Middle School.

Officials said the lockdown ended after the threat was found to be “unfounded.”

Original report:

The Osceola County school district confirmed a middle school was placed on lockdown Wednesday morning.

Officials said Horizon Middle School in Osceola County was placed on lockdown after a threat of school violence was called into the school.

School leaders said all students and staff are safe and law enforcement are investigating the threat.

Officials said they are notifying parents with a call-out message.

Channel 9 is gathering more information and will provide updates on Eyewitness News.

Click here to download our free news, weather and smart TV apps. And click here to stream Channel 9 Eyewitness News live.