In one incident, a car drove through a crowd of protesters and was chased down and attacked by people in another vehicle. The driver was able to escape but was detained by police.
The incident, at least the second Thursday night involving a vehicle and protesters in Los Angeles, happened in Hollywood around 9:30 p.m.
A crowd of several hundred people had gathered at Cahuenga and Hollywood boulevards to protest the Breonna Taylor case.
Most cars stopped for the crowd, but a white Prius tried to weave through the protesters to get by the intersection.
Protesters in Hollywood appear to try to pull driver out of vehicle - Video
Several of the protesters appeared to surround the car and pound on it as it drove by. Several also chased after the vehicle on foot. There did not appear to be any protesters who were injured by the vehicle.
A black pickup truck filled with several people chased after the Prius and stopped in front of it, as a green Mustang pulled up behind it.
People in the truck and the Mustang got out and started attacking the vehicle and apparently attempting to get the driver out. They were also smashing the exterior of the Prius.
The driver of the Prius managed to speed away from the scene and ran at least one red light in his attempt to get away.
Eventually police pulled over the vehicle on Santa Monica Boulevard and detained the driver.
Truck strikes protesters in Hollywood
Earlier in the evening, a pickup truck near Sunset and Seward ran through a group of people and injured at least two. One person was transported with minor injuries to the hospital by ambulance. A second person was transported in a personal vehicle.
Video showed the driver of the vehicle hit one protester, stop momentarily and then take off.
LAPD said in a statement the driver of the blue pickup truck got into an argument with protesters and "attempted to get away from the situation" when he struck the protester standing in the street.
Police caught up to the truck driver and pulled over the vehicle a few blocks from the scene.
All drivers and victims involved in both of the incidents have been identified by police.
An investigation is ongoing.