Federal immigration agents shot and wounded two people in a vehicle outside a hospital in Portland on Thursday, a day after an officer fatally shot a woman in Minnesota, authorities said.

The shooting drew hundreds of protesters to the U.S. Immigration and Customs Enforcement building at night, and Oregon Attorney General Dan Rayfield vowed to investigate “whether any federal officer acted outside the scope of their lawful authority” and refer criminal charges to the prosecutor’s office if warranted.

The Department of Homeland Security said the vehicle’s passenger was “a Venezuelan illegal alien affiliated with the transnational Tren de Aragua prostitution ring” who was involved in a recent shooting in the city. When agents identified themselves to the occupants during a “targeted vehicle stop” in the afternoon, the driver tried to run them over, the department said in a statement.

“Fearing for his life and safety, an agent fired a defensive shot,” it said. “The driver drove off with the passenger, fleeing the scene.”

There was no immediate independent corroboration of that account or of any gang affiliation of the vehicle’s occupants. During prior shootings involving agents from President Donald Trump’s immigration crackdowns in U.S. cities, including the fatal one Wednesday in Minneapolis, video evidence has cast doubt on the administration’s characterizations of what prompted the shootings.

Trump and his allies have consistently blamed the Tren de Aragua gang for being at the root of violence and drug dealing in some U.S. cities.

The Portland shooting escalates tensions in a city that has long had a contentious relationship with Trump, including due to his recent failed effort to deploy National Guard troops there. The city saw long-running nightly protests outside the ICE building.

According to the Portland Police bureau, officers initially responded to a report of a shooting outside Adventist Health hospital at 2:18 p.m. Thursday.

A few minutes later, police received information that a man who had been shot was asking for help in a residential area a couple of miles away. Officers went there and found a man and a woman with gunshot wounds. Officers determined that they were injured in the shooting with federal agents, police said.

Their conditions were not immediately known. Portland police said officers applied a tourniquet to one of them.