(AP) — A 16-year-old girl has pleaded not guilty to attacking another student in a bathroom at Lincoln’s Pius X High School.

A 17-year-old student at the school was attacked on Oct. 7 by a girl using a knife and hammer. The victim has since returned to school after facial surgery and a brief stay in a Lincoln hospital. Police and school officials have said they’ve found no direct connection between the two girls.

Online court records say the suspect waived her right to appear for arraignment in Lancaster County District Court and made the pleas to felony charges of assault and use of a deadly weapon.

The Associated Press is not using the girl’s name because the AP generally doesn’t identify juveniles accused of crimes.