A person was injured in a shooting Tuesday involving U.S. Border Patrol in Arizona about 10 miles north of the U.S.-Mexico border, officials said.
The person, who has not been identified, was shot in southern Pima County near milepost 15 of West Arivaca Road around 7:30 a.m., the Santa Rita Fire District said in a statement. It said it transported the person in critical condition.
Officials did not say that any law enforcement officers were injured. The circumstances of the shooting were not immediately clear.
The Department of Homeland Security did not immediately respond to a request for comment.
The Pima County Sheriff's Department said the FBI asked it to assist in an investigation into a shooting involving a Border Patrol agent in Arivaca, an unincorporated community around 9 miles north of the U.S.-Mexico border.
Crews from the Santa Rita Fire District and American Medical Response provided medical care at the scene, according to a news release.
"Patient care was transferred to a local medical helicopter for rapid transport to a regional trauma center," the fire department said. "The incident remains under active investigation by law enforcement agencies."
The Pima County Sheriff's Department said it is leading a parallel investigation into the use of force.
An FBI spokesperson confirmed that the person was taken into custody Tuesday, adding that there is an ongoing investigation and that "no further information will be provided."
It is standard practice to involve the sheriff's department in an investigation when a federal agent is involved in a shooting incident in Pima County, the sheriff's department said.
"We ask the community to remain patient and understanding as this investigation moves forward," it said in a statement. "PCSD will thoroughly examine all aspects of the incident, however, these investigations are complex and require time."
The shooting comes three days after Border Patrol fatally shotAlex Prettiin Minneapolis and weeks after an Immigration and Customs Enforcement officer shot and killedRenee Goodin Minneapolis. Those shootings havetriggered protestsand generated criticism of DHS, including calls for Secretary Kristi Noem's firing.
House Democratic leaders Hakeem Jeffries of New York, Katherine Clark of Massachusetts and Pete Aguilar of California accused the Trump administration in a statement Tuesday of using taxpayer dollars "to kill American citizens." They also threatened to begin impeachment proceedings against Noem in the House if she is not fired.
Asked Tuesday whether Noem would step down, President Donald Trump told reporters on the White House South Lawn, "No."
Trump said border "czar" Tom Homan was in Minnesota meeting with local officials.
Federal immigration officers have shot 12 people since Septemberas DHS has ramped up deportation operations around the country.