UPDATED: Lockdown lifted at Moore elementary school

MOORE, Okla. (AP) - Classes have resumed at an Oklahoma elementary school that was briefly placed on lockdown after a teacher found a loaded handgun in his classroom.

Moore Police Department spokesman Jeremy Lewis says students at Plaza Tower Elementary School were not in any danger. Lewis tells Oklahoma City television station KWTV that police searched the building to make sure there were no more weapons.

Police say the teacher found the handgun in his chair when he arrived at work Monday morning. Students who were already at the school were taken to the cafeteria, while parents who were dropping off their children were turned away.

Lewis says there was a substitute teacher in the classroom Friday and police are trying to determine whether that teacher had any information about the gun.

Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.