Two NYPD officers were also injured in the protests against recent police-involved killings.
Cindy Gorn and Zachary Campbell surrendered to police on Saturday, officials said.
About 100 demonstrators from both sides shouted slogans and pointed fingers Friday night.
Protests took place Downtown and in Times Square, Bryant Park, Grand Central Terminal and more.
Protesters marched to the Brooklyn Bridge on the second day of demonstrations.
Union head Pat Lynch defended officer Daniel Pantaleo who was arresting Eric Garner when he died.
Diego Ibanez allegedly threw the liquid during the Ferguson grand jury protests in Times Square Monday.
Dozens of demonstrators allegedly swarmed Dishes last week to protest against the working conditions.
One night after a vigil for Kimani Gray turned violent, Tuesday's protest was less chaotic.
Eleven students from the school have locked themselves in the school's Cooper Square building.
Faculty opposed to NYU's expansion plan projected images criticizing the plan on school buildings.
Three were arrested for protesting the guilty verdict of female members of the Russian punk band.
Dep. Inspector Anthony Bologna was caught on video tape pepper-spraying Occupy Wall Street protesters.
Police arrested 19 Occupy Wall Street demonstrators Wednesday for the action on Broadway near Wall St.
Hundreds gathered at Zuccotti Park Saturday to mark Occupy Wall Street's six-month anniversary.
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