WATCH: Phoenix police in riot gear hose down anti-brutality protestors with pepper spray
Phoenix police using pepper spray on marchers -- (News12 screen grab)

An anti-violence rally in Phoenix ended abruptly Friday night when police used massive amounts of pepper spray and bean bag projectiles on protestors sending them running in panic, reports AzCentral.

The protest following the police officer-involved shooting deaths of Alton Sterling and Philando Castile had been scheduled earlier in the week, with city authorities asking organizers to hold off after the tragic shooting deaths of police officers in Dallas the previous evening.

Undeterred, marchers showed up late Friday night and attempted to shut down the I-10 freeway when they were met by a phalanx of police in riot gear who blocked them and demanded that they disperse.

As the crowd chanted "Hands up, don't shoot," police unleashed wave after wave of pepper spray as the protestors fled, with police following some and making arrests.

According to police, three men were taken into custody for throwing rocks at officers, while six people were treated for injuries from the pepper spray or from falling as they ran.

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