Two people were killed in a shooting at the University of Pittsburgh Medical Center on Thursday, and one of the dead was believed to be the shooter, the hospital said.
Seven other people were wounded in the shooting at the Western Psychiatric Institute and Clinic, UPMC said in a Twitter posting.
"Police have told us there were 9 total victims ... 2 of whom have been confirmed dead," UPMC said on Twitter.
"According to police, 1 of 2 confirmed dead... is believed to be the shooter," it said on Twitter.
Earlier reports of a second shooter were inaccurate, UPMC said.
UPMC spokeswoman Allison Schlesinger said victims were taken to the UPMC Presbyterian Emergency Room.
The Pittsburgh Post-Gazette said a UPMC police officer had been shot in the leg.
The incident began at about 2 p.m.
An eyewitness said police were escorting people out of the psychiatric institute, and police were going into the building with bomb-sniffing dogs.
Pittsburgh city police had officers at the scene but could not yet provide details, a spokesman said. A university police spokesman said he had no information to report.
Measures have been put into place to secure hospital patients and staff, UPMC said on Twitter.