ICE officers stand guard outside of the Portland ICE Building during immigration protests on Saturday. (Jonathan House / Portland Tribune)

Three people were arrested when protesters clashed with Portland police and federal agents at the U.S. Immigration and Customs Enforcement building in South Portland on Saturday and Sunday.

Charges included assault, criminal mischief, and driving under the influence of intoxicants.

Police were monitoring the growing demonstration and declared a riot around 6:30 p.m. on June 14 p.m., telling people they the crowd to disperse and warning they would be making arrests.  The riot was declared  after federal agents at the building used tear gas to move the crowd estimated to be in the hundreds away from it.

Police closed the area around South Moody Avenue and South Bancroft Avenue and said anyone who does not leave the area by traveling north would be subject to arrest, citation and possibly “crowd control measures, including munitions or other physical force,” if necessary, on their PPB Event Messages X account.

Protesters gathered outside the building during and after a peaceful  “No Kings” march in the downtown and Central Eastside area brought tens of thousands of demonstrators into Portland on Saturday afternoon. This is a developing story and will be updated.

Protests have been held at the building for several weeks. They are peaceful during the day but have escalated in recent nights, with police arresting at least 14 people for crimes including assault and criminal mischief during the past week.

KOIN 6 News is a news partner of the Portland Tribune and contributed to this story. Their full story can be found at koin.com.