Chaos broke out in Portland, Oregon Monday during May Day demonstrations.
The Portland Police Department tweeted consistently throughout the demonstrations. The violence was so severe that the Portland Police declared the demonstration a riot.
Marchers began throwing projectiles and smoke bombs at police in Portland, while others started setting fire and smashing the windows of businesses. Police said they were forced to cancel the permit 'due to numerous incidents of thrown projectiles, incendiary devices, and other unsafe conditions.'
A police car was destroyed by violent anarchists and Portland Police warned people to stay out of downtown Portland.
Protests in New York City also erupted when demonstrators clashed with people opposing their rally in Union Square.