More than 60 emergency calls to police went unheeded overnight in Portland as officers were preoccupied with hundreds of demonstrators downtown and were pelted by rocks.

On the 80th consecutive night of protests, the Portland Police Bureau declared a riot around midnight Sunday after a crowd of hundreds had blocked traffic for three hours by the Penumbra Kelly Building in the 4700 block of East Burnside Street, trespassed on the closed property and engaged in “violent, tumultuous conduct.”

The targeted building is owned by the city and is used by city and county employees, including the Police Bureau.

From midnight to about 2:45 a.m., protesters ignored warnings from police to disperse and began arguing amongst themselves.