Police confirm the man shot Swift and Isley on the second floor of the hospital in Birmingham just before 7 p.m. Wednesday.
Police vehicles are shown outside UAB Highlands Hospital following a shooting on Wednesday.. Williston told WIAT that one victim died during surgery.
Nancy Swift, 63, was a nursing supervisor.
Lt. Peter Williston, a spokesman for the Birmingham Police Department, said investigators were still sorting out what had occurred. Police have not yet released his name.
The suspected gunman was found dead from a self-inflicted gunshot wound in a third-floor emergency room.More news: Re-signing Solder is the Pats' top priority
Police had the scene secured and authorities issued an "all clear" alert about 7:45 p.m. after ordering students to shelter-in-place.
Officials say the hospital has metal detectors that were in use, but they didn't explain how the shooter entered the building with a gun.
Birmingham Fire and Rescue Service Captain Harold Watson says authorities are unsure of the shooter's relation to the victims and that police "still have a lot to find out".
All surgeries scheduled for UAB Highlands on Thursday have been canceled.
WBRC-TV reported that the victims are believed to be employees at the hospital.