Police late Monday afternoon were investigating a shooting at the California Department of Corrections building in San Francisco.
The victim, an 18-year-old who was on pretrial release, has been transported to a hospital with life-threatening injuries, police sources tell NBC Bay Area. Authorities initially told NBC Bay Area the victim was a parolee.
Witnesses tell police the suspect hopped into a white vehicle and fled the area.
Several nearby streets are blocked off and police have alerted residents to avoid the area of 13th Street and South Van Ness Avenue.
Police said no Department of Corrections personnel are involved in the incident.
No other information was immediately available.