Last night the police arrested more people than they had altogether in the previous days of the anti-RNC protests in NYC.

The New York Public Library at 42nd St was among the principal sites of clashes between protestors and police,

Here's the story from AP.
NYC Police Arrest Nearly 1,000 Protesters

1 hour, 8 minutes ago

By SARA KUGLER, Associated Press Writer

NEW YORK - Wielding metal barriers and orange netting, police struggled to contain swarms of anti-GOP protesters on the second day of the Republican National Convention, eventually arresting nearly 1,000 demonstrators with their sights set on a fortress-like Madison Square Garden.

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