An 18-year-old woman was facing several charges Friday morning after Pittsburgh police said she pretended to be a student at Perry High School.

According to the criminal complaint, Corial Littlejohn walked into the school shortly before 9 a.m. Thursday.

She told security she was headed to class, but when she arrived the teacher did not know who she was.

Police said Littlejohn shoved an assistant principal and ran out of the school, where she got into a physical altercation with security guards.

Littlejohn was facing charges of aggravated assault. The criminal complaint said she was involved in a prior incident with one of the assistant principals at the school, but the document did not go into detail about it.