At approximately 12:18 p.m. Friday afternoon, Big Rapids Middle School was placed under an unplanned lockdown.

Local law enforcement arrived on scene shortly, but found no threat on school grounds.

"In an abundance of caution, officers cleared all classrooms and ensured there were no threats," Big Rapids Department of Public Safety said via a press release. "At no time were students in any danger and the lockdown was an automatic trigger."

The cause of the threat was determined to be a malfunction in the school's vape detection system, which triggered the lockdown. Following confirmation of no threat, the lockdown was lifted and school returned to session.

"We understand that situations like this can be concerning for students and families, and we appreciate your understanding," Big Rapids Middle School said in a statement. "Please know that we take all safety matters seriously and will always act with caution to protect our school community."

The Big Rapids Police Department was assisted on scene by the Mecosta County Sheriff’s Office, Ferris State University DPS, the Big Rapids Fire Department, Mecosta County EMS, the Mecosta County Sheriff’s Posse, and Meceola Central Dispatch.