Thousands of protestors shut down swathes of downtown Manhattan and Brooklyn in the second night of protests sparked by a grand jury's decision not to indict a police officer who killed Eric Garner in a chokehold this summer.

By 8 p.m. Thursday, both the West Side Highway and Brooklyn Bridge were shut down by protestors. Police tell CNN they're trying to give protestors breathing room.

Update 8:25 p.m.

There are already reports of arrests:

Update 9 p.m.

A protestor was reportedly hit by a cab a few blocks away from the Brooklyn Bridge.

Update 12 a.m.

Protestors staged a mass sit-in at the Holland Tunnel, completely blocking traffic.

[screenshot via CNN]