Active Shooter Situation at UPMC in York. At least 6 Ambulance and 20 Police units

Drove by and saw tons of cops and ambulance headed there. Turned in e the police scanner and heard that there's an active threat.

One Officer down. Asking for officers to grab stretchers to help get patients out. Not sure if that's victims of the shooting or patients at the hospital.

Edit: Multiple casualties. Patients headed to York Hospital.