Four students were arrested, according to authorities, but only one is under investigation for the firearm discharge. One person was treated for minor injuries unrelated to the incident.
James Denman Middle School and Leadership High School are no longer on lockdown. A city-wide alert has been sent for all schools to lift their respective campus lockdowns.
This is no longer a SWAT or tactical situation and command has been returned to the commander of Ingleside Police District.
Officers are continuing a full search of the school for potential victims, witnesses, and any evidence which will aid in their investigation.
According to SWAT, the suspect and the his handgun are both in custody.
Officers may have detained the suspect.
The suspect is now wearing a white t-shirt, light colored jeans, and white sneakers.
Video surveillance footage shows the suspect removing his red hoodie.
Paramedics are tending to an injured person on campus; however, it's unclear if that injury was a result of this incident.
SFFD paramedics and firefighters are on scene.
A SFPD Deputy Chief is on scene and has assumed command of the incident.
Officers from SWAT are arriving on scene to aid in the search.
Police are setting up a perimeter.
According to school officials, the suspect is believed to still be on campus.
Officers have located his backpack, which was empty.
The suspect is described as a 14- to 15-year-old Black boy wearing a red hoodie, blue or purple Spider Man backpack, light blue pants, and white sneakers.
Additional units from surrounding police districts are responding to help with the search.
BART has been notified of the possible threat and are on the lookout near Balboa Park station.
The suspect's backpack was found in the second-floor boys' restroom.
Leadership High School and James Denman Middle School are both locked down.
Someone may have spotted the suspect in the second-floor boys' restroom.
Officers are clearing the school, room-by-room.
The suspect may still be in the building and police have surrounded the campus.
According to officers, a student fired a single gunshot into a classroom.
SFPD officers have locked down Balboa High School after a single gunshot was fired.
Incident reported at 1000 Cayuga Ave.