The mother of a 6-year-old boy who brought a loaded .45-caliber handgun to a western Pennsylvania school has been arrested.

Monroeville police said Stephanie Lynn Roth has been charged with misdemeanor counts of reckless endangerment, child endangerment and possession of drug paraphernalia.

Police Chief Doug Dole said the boy turned over the gun after bringing it to Ramsey Elementary School in his backpack Wednesday morning. The weapon was quickly taken from him and nobody was hurt.

Investigators say they believe the student did not know the gun was in the backpack. No additional details were immediately released.

The school is part of the Gateway School District about 15 miles east of Pittsburgh.

Spokeswoman Cara Zanella says the situation was dealt with quickly before a lockdown became necessary.