Nineteen-year-old Stephen Powell is dead after being shot late Saturday night during a San Francisco gay pride event, the AP reported.

Powell was among the three people hit by gunfire at about 11:30PM in the city's predominantly-gay Castro district as Pink Saturday kicked off the city's 40th annual gay pride weekend.

Powell was the most seriously injured during the shooting spree. He was transported to a hospital where he died. The San Francisco medical examiner's office announced Powell's death Sunday but has yet to determine a cause of death.

The other two people – a 27-year-old male and a 19-year-old female – were both shot in the leg.

Police say they took a 19-year-old male into custody and recovered the handgun allegedly used in the shooting.

An unidentified eyewitness called the scene “mayhem.” Police say the shooting was not connected to the festivities.

Thousands are expected to attend the city's 40th annual gay pride parade Sunday. House Speaker Nancy Pelosi is expected to address the crowd in a recorded message.