A 16-year-old boy died and six others were injured -- two critically -- Friday morning after a multiple vehicle crash in San Francisco's Lower Pacific Heights neighborhood.
"This is about as ugly an accident that I've ever seen," Police Chief Greg Suhr said. "And when you lose a child, it just doesn't get worse than that."
Police say a 58-year-old female driver appeared to have been driving at speeds of up to 80 mph - in a 25-mph zone - just before 7 a.m. at Pine and Gough streets when her silver Mercedes-Benz smashed into a minivan carrying a mother and two children, and a delivery van with three inside.
After the crash, witnesses said the driver got out and put her hands behind her head. She was not seriously injured, but was being questioned at the hospital, Suhr said.
Police said Friday afternoon the driver, who has not been identified, would face involuntary manslaughter charges upon her discharge from the hospital.
The teen was identified by the San Francisco medical examiner as Kevin San, 16, of San Francisco. Suhr said San's mother and another child were also in the car, comprising the two critical injures. The three in the delivery van were also injured.
Aerial images taken from NBC Bay Area's chopper showed two cars flipped on their sides with extreme damage. Firefighters and emergency crews poured what appeared to be salt on the roadway, and a Muni bus was stopped with lights blinking just behind the accident.
RAW VIDEO: Teen Dead, 6 Injured in San Francisco Crash
"It sounded like a bomb," one witness told NBC Bay Area.
The intersection of Pine and Gough was shut down and is expected to be closed for an extended period of time.
UPDATE: The San Francisco Chronicle reported that police have arrested a woman on suspicion of vehicular manslaughter in connection with the deadly crash.
Investigators said she is the driver who crashed her car into a minivan Friday morning at Gough and Pine streets.
Police did not release the woman's name but said it does not look like alcohol or drugs played a factor in the crash.