PORTLAND, Ore. (KOIN) — Portland police are investigating criminal activity and processing arrests following a protest that ended in fires, clashes and looting near the Portland Police Bureau’s North Precinct overnight.

KOIN 6 News crews captured the broken windows of Bank of America and neighboring clothing business, Top to Bottom — these were at least two buildings victims of vandalism. Martin Luther King Jr. Boulevard is home to many minority business owners, including Black-owned businesses.​

We spoke to a business owner who was cleaning up the area to help out, and he says he’s tired of the vandalism. ​

“People are going to do what they do. I can only worry about me,” said Brandon Dean, owner of Back to New Details. “If people want to keep coming out here destructing stuff? Me and my business are going to do whatever we can to pitch in.”​

Portland police say they arrested 4 people over the course of the fiery protests, as well as arrests for assaults on police officers. ​Police said the protests overnight were notably more aggressive than those seen in recent weeks.

According to police, the north side of the North Precinct was set ablaze around 2:15 a.m. In response, officers used CS gas, a type of tear gas, to disperse the crowd — a few canisters of which were thrown back at police by some protesters. Earlier in the night, demonstrators reportedly attempted to create an autonomous zone outside the precinct before an unlawful assembly was declared.

At one point in the early morning, protesters and officers physically clashed as police tried to move them from the area. Some protesters shot paintballs at the officers’ face shields, rendering them unable to see. Police say crowd control munitions were used at this time.

The majority of protesters dispersed around 3:30 a.m., according to PPB. Police said multiple officers suffered non-life-threatening injuries as a result of the demonstrations.