All nine people aboard the helicopter died in the crash, the Los Angeles County Sheriff's Office confirmed via Twitter. Multiple sources, including TMZ and ESPN's Adrian Wojnarowski, reported Bryant's daughter Gianna was also among those who were killed.
Wojnarowski reported another player and parent were aboard the helicopter en route to a basketball game.
The aircraft went down at approximately 10 a.m. Pacific time near Las Virgenes Road and Willow Glen Street.
A spokesperson for the FAA identified the aircraft as a Sikorsky S-76. TMZ reports Bryant owned that model of helicopter.
TMZ was first to report that Bryant was among those on board the aircraft when it crashed. Bryant's wife Vanessa is not believed to have been on board.
Bryant, 41, retired in 2016 after 20 years with the Los Angeles Lakers and five NBA championship titles.
He and his wife have four daughters: Gianna, Natalia, Bianca, and Capri.
The shocking news quickly became the No. 1 trending topic on Twitter, with tributes to Bryant pouring out from across the world.
Video circulated online of Toronto Raptors and San Antonio Spurs players committing back-to-back 24-second shot clock violations at the start of their game in honor of Bryant, who wore No. 24.
Fans in the arena could be heard chanting "Kobe! Kobe! Kobe!"
Tiger Woods posted a throwback photo of him and Bryant in 1996, saying "Hug your loved ones."
Utah Jazz authority David Locke also tweeted a tribute to Bryant: "There was a buzz every time Kobe entered an arena."
President Donald Trump also shouted out the NBA legend:
Jazz defender Rudy Gobert also tweeted an apparent reference to Bryant's death.
Mitt Romney also tweeted about the incident.
This is a developing story.