A youth was taken into custody after a weapon was found at Kelly Road Secondary School on Friday morning.
Prince George RCMP were called to the scene shortly before 9 a.m. and a lockdown was imposed at the school. There were no injuries and the lockdown was lifted about 20 minutes later.
Details on the type of weapon were not provided.
"Incidents like this within our schools are taken very seriously by the police and the quick response by our officers ensured this matter was resolved safely," said Prince George RCMP Cpl. Carmen Kiener.
School district superintendent Marilyn Marquis-Forster said police were called after a threat was reported to the school's office. The school was back to regular operation by about 9:15 a.m.
"Everyone is safe," she said and added the school's principal is drafting a communication to parents that will also appear on the KRSS website.