SAN FRANCISCO: A shooting during a Juneteenth celebration at Lake Merritt in Oakland,  US state of California,  left 15 people injured,  the police said.
The crowds were peaceful until around 8:15 p.m. local time on Wednesday when an illegal sideshow involving vehicles and motorbikes occurred near Grand Avenue and Bellevue Avenue,  Oakland Police Department said on Thursday in a press statement.
During the sideshow,  someone walked onto the hood of a car,  which led to the occupants getting out and assaulting that person. Then came the gunfire,  Oakland Police Department Chief Floyd Mitchell said at a press conference on Thursday noon as reported by Xinhua news agency.
The Oakland Fire Department said it transported at least four gunshot victims to a local hospital.
Police also took some victims to nearby hospitals. Other victims were self-transported.