Occupy Portland is in the headlines again. The Oregon city’s mayor, Sam Adams, gave hundreds of camped-out protesters a deadline of midnight on Saturday, but the group refused to leave.

Around 1:45 Sunday morning, a police officer was injured when a firecracker was reportedly thrown from a crowd. Sunday, the park was officially closed but "hundreds" (Video and photos look like way more than hundreds!) of occupiers were staying put.

Police in riot gear surrounded the encampment and warned the demonstrators that they may be "subject to chempical agents and impact weapons."

Several cities across the nation have been cracking down on protesters, including Oakland, Salt Lake City, Denver, and Albany.