Two 13-year-old girls were charged with multiple felonies this week after seriously injuring another student with a Stanley cup during a fight at a Delaware middle school, officials said.

Delaware State Police responded to the incident at Calvin R. McCullough Middle School in New Castle on Feb. 28. Its investigation revealed that the two students struck another 13-year-old girl “multiple times in the head with a metal Stanley cup.”

A 12-year-old boy was also involved in the fight and struck the victim with his hands, according to police. He was charged with a misdemeanor offense.

The students were separated by school staff and the victim was transported to an area hospital to be treated for “serious injuries to her head.”

Both girls were charged with three felonies — second-degree assault, second-degree conspiracy and possession of a deadly weapon — as well as a disorderly conduct charge.

Colonial School District said the students facing criminal charges will also face disciplinary actions, and the district is cooperating with authorities.  

“Violence in the Colonial School District is never condoned,” a district spokesperson said in a statement. “ministrators are in touch with the families involved in this unfortunate incident.”

Both teenagers turned themselves in this week, and were released to their guardians on $7,500 bonds after being arraigned by New Castle County Family Court.