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DOWNTOWN BROOKLYN — Protests over the deaths of people of color in police custodylasted all afternoon, and into the evening, but as night fell, violence increased significantly.

An NYPD van was set on fire, there were clashes between protesters and police, and officers made more arrests in addition to those they’d made much earlier in the day.

What began as a gathering of a couple hundred people in Lower Manhattan ended up fanning out to Brooklyn, where, at around 5:30 P.M, a crowd of thousands convened at Barclays Center here to raise their voices.

The gathering began peacefully. However, NYPD officials said that by Friday evening, dozens of people had been arrested in protests.

Read more: Protests continue in NYC over death of George Floyd, injustice for people of color

Hundreds of police officers lined the perimeter of the Barclays Center plaza at the intersection of Atlantic and Flatbush Avenues.

In the midst of the officers were the protesters. They shouted slogans, displayed signs, and joined in applause, in unison.

It’s unclear how long the demonstration will continue. Word continues to spread on social media for people to come to the scene. The crowd continues to build in size.

A second day of protests in New York began at around 4 p.m. in Foley Square in Manhattan. Over the course of the evening, some demonstrators moved to Barclays Center where the protest grew.

Demonstrations continued through Brooklyn, and one person shared video of a police vehicle that was set on fire.