An American was killed during a shootout in a resort city in Mexico involving the military that also injured six individuals, according to officials.
The identities of all four officers have been released.
Police say two men were shooting at each other around 12:30 Wednesday morning. An adult's foot and 4-year-old child's leg were grazed.
New dashcam video shows the moments gunfire sent people running and ducking for cover near Pier 39 and along San Francisco's Embarcadero.
Other passengers were caught in the crossfire.
Police say the shooting happened around 9 a.m. Wednesday after 59-year-old Robert Carroll got into an argument with the security guard outside School 21 near Madison and 10th avenues.