CALGARY -- A lockdown at Sir Winston Churchill High School in northwest Calgary has been lifted.

Police were called by school officials after 3 p.m. for a complaint of a possible weapon.

According to police, staff at the school were advised by a student that had seen another student with a handgun in his backpack. Upon learning of this, the principal put the school in lockdown and called Calgary police.

A large number of officers responded to the scene and the building was searched. The police located a male and discovered that he had an Airsoft gun, which is a replica toy.

From the police department's perspective, because all protocols were put into place, the incident was very uneventful. The school followed all policies and procedures.

School employees will deal with the student, who the police believe was not using the Airsoft in a threatening manner.

The lockdown was lifted just before 5 p.m., after an hour and 34 minutes.