Published: Jun 09, 2014 3:56 PM EDT

LEE COUNTY, Fla.- Security located a stolen handgun inside of a backpack at HealthPark Hospital on Friday.

Housekeeping staff found a green backpack in a room where a patient had been recently discharged. It was given to the nurse's station, and the patient's parents were contacted.

The patient said he would be back to pick up his bag. It was then given to security and opened. Inside, they found a silver .357 revolver.

Lee County Sheriff's deputies were called. They looked up the serial number and discovered the weapon had been reported stolen out of Garden City, Michigan in 2006

The gun was seized. The investigation continues.