A gunman opened fire on a police officer and two hospital employees at St. Vincent's Hospital in Birmingham, Alabama early Saturday morning. According to WAFF, News 48, the incident took place at about 4:00 a.m. on the hospital's fifth floor.

Birmingham Police Department spokesperson Sgt. Johnny Williams told WAFF that the gunman positioned himself in a hallway and shot at the officer and the hospital staff members as they stepped out of an elevator. Another police officer reportedly came around the corner, alerted by the noise, and fatally shot the gunman.

The injured officer and hospital workers were evacuated to University of Alabama at Birmingham Hospital. Police have not released their names, but said that their injuries are not life-threatening.

Investigators have not identified the gunman or said what he was doing at the hospital before the shootings. They are currently studying surveillance camera footage to determine exactly what happened.

Sgt. Williams told Alabama.com that police are confident that the unnamed shooter acted alone and that the attack was an isolated incident.

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