Bryant: Investigators work to determine crash cause

US investigators are working to determine the causes of the helicopter crash that killed basketball star Kobe Bryant in California on Sunday.
There were no survivors from the crash which happened in foggy weather. Investigators are expected to focus on this and on any mechanical failures that may have occurred.
Nine people died in the crash, including Bryant’s daughter, Gianna.
Tributes from fans and public figures have been pouring in from around the world.