AURORA, Ill. (CBS) – A seventh-grader faces felony charges after he brought a loaded handgun to his middle school Friday morning, Aurora police said.

Police say they were called to Waldo Middle School, 56 Jackson St., at 10 a.m. and learned a student told administrators he overheard a fellow pupil say he had brought a gun into the building.

LISTEN: WBBM Newsradio’s Nancy Harty reports

After questioning the student who allegedly made the claims, officials found the weapon – a .357-caliber firearm – in the boy’s locker, police said in a news release.

Authorities say the boy, who is 13, is not involved in gangs and apparently had no plans to use the gun. Police are still investigating where the gun came from and how it came into the boy’s possession.

The unnamed middle-school student was charged with two counts of aggravated unlawful use of a weapon and transported to the Kane County Youth Home in St. Charles.  He will appear before a judge on Monday for a hearing, police said.

The school was on lockdown temporarily Friday.