PITTSBURGH — A 15-year-old girl has been taken into custody after Pittsburgh Public Schools officials say she picked up a steak knife in a teachers lounge at Oliver Citywide Academy and refused to surrender the weapon until school police arrived.

District spokeswoman Ebony Pugh says the special education student is being charged in juvenile court with aggravated assault and disorderly conduct in connection with Wednesday morning’s incident.

Pugh says the girl didn’t threaten or injure anyone, but a teacher in the room felt at risk.

She may face additional school sanctions.

Pugh says the girl took the knife from a table and waited until the officer arrived from another part of the building before handing it to a school administrator.