Police have identified three men who were arrested during a "Rally for Justice" on Friday night in Phoenix.
Andre Hendrix, 24, and Christian Soto, 21, were arrested on charges of aggravated assault on a police officer and obstructing governmental operations.
Devin Brooks, 24, was also arrested, but on a charge of disorderly conduct, or refusal to disburse.
Police said Saturday morning that the arrests were made after subjects threw rocks at officers during the demonstration.
Though several officers were hit with the rocks, no officers reported injuries.
Police also say that officers were given a route for a march during the demonstration, but it was changed at one point as some demonstrators intended to march onto the I-10 freeway in downtown Phoenix.
As many as six people were injured during falls or from pepperballs -- described by police as paintball-type balls with pepper spray -- deployed by officers to keep demonstrators back.