OREGON, United States (AP) — The mayor of Portland, Oregon, was tear-gassed by US Government agents late Wednesday as he stood outside a federal courthouse during another night of protests against the presence of the agents dispatched by President Donald Trump to quell the city’s ongoing unrest.

Mayor Ted Wheeler, a Democrat, appeared slightly dazed and coughed, said it was the first time he’d been tear-gassed.

He put on a pair of goggles someone handed him and drank water but did not leave his spot at the front and continued to take gas as the protest raged — with demonstrators lighting a large fire between the fence and the Mark O Hatfield Federal Courthouse amid the pop-pop-pop sounds of the federal agents deploying tear gas and stun grenades into the crowd.

It wasn’t immediately clear if the agents knew Wheeler was among those in crowd when they used the tear gas.

Earlier in the night, Wheeler was mostly jeered as he tried to rally demonstrators who have clashed nightly with federal agents but was briefly applauded when he shouted “Black Lives Matter” and pumped his fist in the air.

Wheeler has opposed federal agents’ presence in Oregon’s largest city, but has faced harsh criticism from many sides and his presence wasn’t welcomed by many demonstrators who yelled and swore at him.

“I want to thank the thousands of you who have come out to oppose the Trump Administration’s occupation of this city,” Wheeler told hundreds gathered downtown. “The reason this is important is it is not just happening in Portland … we’re on the front line here in Portland.”

Wheeler has been accused by critics, including city council members, of not reining in local police who used tear gas multiple times on protesters before federal agents arrived early this month in response to nearly two months of nightly protests since George Floyd was killed. And city business leaders have condemned Wheeler for not bringing the situation under control before the agents showed up.

Department of Homeland Security (DHS) Acting Secretary Chad Wolf denied that federal agents were inflaming the situation in Portland. He told CBS This Morning yesterday that Wheeler legitimised criminality in the city by going to the front of huge crowd of demonstrators right in front of the courthouse where the fires were lit and people were trying to pull down the protective fence.

“What we know is before DHS law enforcement, civil law enforcement, officers arrived in Portland, the mayor is on record as saying that the city is on — has a certain level of violence,” Wolf said. “It was ongoing well for a month before we arrived.”

Wheeler did not participate in lighting any of the fires or attempting to tear down the fence and was surrounded by his security team when he was gassed.

Earlier, protesters held signs saying “Tear Gas Ted” in reference to the Portland Police Bureau’s use of the substance before federal agents arrived. As Wheeler left the protest zone about 12:40 am yesterday, one person shouted that he should be there “every single night”.

Less than an hour after Wheeler left, the Portland Police Bureau declared there was a riot at the site and threatened to use tear gas but officers never did and made no arrests.

In a statement later yesterday, police said the crowd threw Molotov cocktails, lit fires in a park and in trash cans and released hundreds of gallons of water from fire hydrants.

Before he was tear-gassed, Wheeler was criticised for not defunding the local police and for not assigning Portland police to protect protesters from federal agents.

Earlier Wednesday, the City Council banned police from cooperating with federal agents or arresting reporters or legal observers.

Wheeler’s appearance in the protest zone came hours after state attorneys for Oregon urged a judge to issue a restraining order against agents deployed to tamp down on the protests.

The arguments from the state and the US Government came in a lawsuit filed by Oregon Attorney General Ellen Rosenblum, who accuses federal agents of arresting protesters without probable cause, whisking them away in unmarked cars and using excessive force. Federal authorities have disputed those allegations.

The lawsuit is part of the growing criticism of Trump’s order that sent the federal agents to Portland and pending orders for them to head to Chicago and Albuquerque, New Mexico, to fight rising crime.

Trump’s move has deepened the country’s political divide and has potentially set up a constitutional crisis months ahead of the presidential election. Democratic mayors of 15 cities condemned the use of federal officers in a letter to the US attorney general.

The court hearing focused on the actions of the more than 100 federal agents responding to protests outside the Portland courthouse.

The motion asks US District Judge Michael Mosman to command agents from the Department of Homeland Security, Customs and Border Patrol, Federal Protective Service and US Marshals Service to immediately stop detaining protesters without probable cause, identify themselves and their agency before arresting anyone, and explain why an arrest is taking place.