A riot was declared in Portland just after midnight Thursday morning after Mayor Ted Wheeler’s tense visit with protesters-- where he was booed, told to resign, given a list of demands and tear-gassed by federal agents.

His visit ended with his security detail engaging in a struggle with protesters late Wednesday night as they worked to get the mayor to safety, a report said.

Earlier, he moved with protesters to the fence outside of the federal courthouse where he stood at the front and was tear-gassed along with the crowd, according to New York Times correspondent Mike Baker.

Wheeler called the tear-gassing an "egregious overreaction," telling Baker he didn't see anything in the crowd that warranted the reaction by federal officers.

"This is not a de-escalation strategy," he said. "This is flat-out urban warfare and it's being brought on this country by the president and it's got to stop now."

As Wheeler left, a few protesters following him tried to push against his security team once he had entered a building. Others threw water bottles and other projectiles at the glass door, according to Baker.

Portland's City Council passed new policies on Wednesday that immediately bans all police bureau members from working with federal law enforcement and prevents them from intentionally arresting or using force on journalists and legal observers.

Wheeler had joined protesters downtown earlier in the evening for a listening session where he thanked them for opposing the Trump administration’s “occupation” of the city in the deployment of federal agents.