LAPD says it conducted "Operation Street Sweeper" on a gathering of 700 people at a Harbor Gateway street takeover overnight, impounding 200 vehicles.
One person was hospitalized and another was taken into custody after a possible stabbing at the Westfield Topanga shopping mall in Canoga Park, authorities said.
Hundreds of spectators gathered for street takeovers in L.A. County, including a collision in Northridge involving a car that plowed into a crowd of onlookers.
Two people were wounded, one critically, when a man armed with a handgun fired into a large crowd in downtown Los Angeles, authorities said.
LAPD Chief Jim McDonnell described how police have been using drones as first responders as part of a pilot program that began nearly a year ago.
The Sixth Street Bridge was reopened between downtown Los Angeles and Boyle Heights after hours of police activity, authorities said.