Tensions over U.S. President Donald Trump's immigration crackdown rose across the United States on Thursday after the second shooting involving immigration officers in two days, deepening rifts between state and federal officials over how and why the shootings occurred.

Protests intensified in Minnesota following Wednesday's fatal shooting of a 37-year-old mother by an Immigration and Customs Enforcement officer. Minnesota and U.S. officials offered starkly different accounts of the shooting, and state investigators complained they were shut out of the federal inquiry.

Then in Oregon a U.S. Border Patrol agent shot and wounded a man and a woman in Portland on Thursday afternoon. Again, local officials, who immediately called for calm, said they could not verify the federal government's account of the incident.

In both cases, Democratic mayors and governors demanded the Trump administration withdraw federal officers, who have been deployed largely to Democratic-led cities in moves approved of by many of the president's supporters after Trump campaigned on a promise to deport undocumented immigrants.

Democrats and civil rights activists have decried the aggressive enforcement operations as an unnecessary provocation.

"When a president endorses tearing families apart and attempts to govern through fear and hate rather than shared values, you foster an environment of lawlessness and recklessness," Oregon Governor Tina Kotek said.

In both the Minneapolis and Portland shootings, U.S. officials contend they were part of a increasing trend of criminal suspects and anti-Trump activists using their cars as weapons, though video evidencehas sometimes contradicted their claims.

In Minnesota, an ICE officer fatally shot Renee Nichole Good, a U.S. citizen who according to one activist was participating in a "neighborhood patrol" that observes ICE activities. U.S. officials alleged she attempted to run over the agent, while defenders of the woman said they believe video showed she steered away from the officer.

In the Portland incident, the Department of Homeland Security said the driver, a suspected Venezuelan gang member, attempted to "weaponize" his vehicle and run over agents. In response, DHS said "an agent fired a defensive shot" and the driver and a passenger drove away. Portland police said two gunshot victims were later found about two miles (three kilometers) away and taken to hospital.

National guard on alert

Facing the potential of civil unrest, Minnesota Governor Tim Walz has put the state's National Guard on alert.

Hundreds of demonstrators gathered in Minneapolis on Thursday, chanting "shame" and "murder" at armed and masked federal officers, some of whom used tear gas and pepper balls on protesters.

"I feel like we're at a turning point. I can't say it enough, but things have got to change," said Minneapolis protester Rachel Hoppei, 52.

"We don't want you," she said of federal officers. "You have no right to be here. You're destroying our communities."

Minnesota officials complained they were denied access to the scene evidence, case materials or interviews. U.S. Department of Homeland Security Secretary Kristi Noem told reporters in New York that Minnesota simply did not have jurisdiction.

Without access, the Minnesota Bureau of Criminal Apprehension said it had withdrawn from the investigation.

The ICE agent who shot Good was among 2,000 federal officers the Trump administration has deployed to the Minneapolis area in what it described as the "largest DHS operation ever." Part of Trump's nationwide crackdown on migrants, the operation was also mounted in response to a politically charged investigation into fraud allegations against some nonprofit groups in the Somali community.