One person was killed and two others injured following a shooting Saturday evening at a gay pride event in San Francisco, authorities said.Stephen Powell, 19, died after being shot in the chest during a street party in the city’s Castro District, said San Francisco police spokesman Samson Chan. A 19-year-old woman and 29-year-old man were also shot, but are expected to survive.A 19-year-old man was arrested at the scene and is being held in connection with all three shootings, Chan said. He declined to release the suspect’s name.Chan said there was no immediate indication as to the motive, and that the crime remained under investigation.

The shootings occurred during the “Pink Saturday” celebration, a prelude to Sunday’s Gay Pride parade.

-- Scott Glover