Three students were injured at Carrick High School on Wednesday morning following a stabbing, authorities said.

Pittsburgh police, firefighters and EMS personnel were dispatched to the school for a "critical incident," Pittsburgh Public Safety said Wednesday morning .

A spokesperson for Pittsburgh Public Schools released a statement detailing the incident, saying a student used a "small knife" to injure three other students.

All victims were receiving medical attention as of 9:25 a.m.

Of the three students injured, one was treated and released at the scene, one was transported to UPMC Children's Hospital in stable condition, and a third was taken to UPMC Mercy with a more serious injury, officials said.

The student responsible is in custody. The suspect also sustained a laceration

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