The group peacefully walked through light traffic and mostly empty streets before stopping in front of Los Angeles Police Department headquarters where a video projected onto the building played in front of the crowd.
Police officers could be seen walking out in front of the building as the protesters arrived around 10 p.m.
Some protesters were seen tearing down a barricade around 11 p.m. that police had set up earlier.
Around 11:30 p.m., police could be seen scuffling with several protesters as they moved the crowd away from the building.
Police said the gathering was an unlawful assembly.
As the demonstration carried on, more police officers arrived and asked the crowd to disperse. Video captured non-lethal rounds being fired by police into the crowd after ruling the gathering an unlawful assembly.
Rubber projectiles used during the demonstration littered the front of police headquarters.
It appeared that demonstrators also threw objects at officers. LAPD reported minor injuries to officers and they were treated at the scene.
Although some officers received minor injuries, police said there were no arrests.
"Our Department is committed to ensuring demonstrators in Los Angeles are able to safely express their 1st Amendment Rights to freedom of speech and to peacefully assemble," the LAPD said in a statement, adding that it is committed to reviewing every instance involving use of force.