(CHICAGO) -- The Illinois National Guard has received an official notification from the Pentagon authorizing a mission in Chicago, according to an Illinois official.
The official confirmed the mission will involve 300 Guardsmen tasked with protecting federal property under Title 10 authorities.
The Guard has not received mobilization orders, which means it will take a number of days to process and muster soldiers -- and train them for the mission, according to the official.
At the very earliest, Guardsmen would be deployed in Chicago at the end of this week, the official said.
“The Governor did not receive any calls from any federal officials. The Illinois National Guard communicated to the Department of War that the situation in Illinois does not require the use of the military and, as a result, the Governor opposes the deployment of the National Guard under any status," a spokesperson for Illinois Gov. JB Pritzker said in a statement.
The authorization comes amid escalating tensions in Chicago over the Trump administration's immigration crackdown.
U.S. Customs and Border Patrol agents on Saturday shot and wounded a woman they alleged was part of a convoy of protesters that rammed their vehicles during an "ambush."
Department of Homeland Security Secretary Kristi Noem said Border Patrol agents opened fire on the woman in self-defense, alleging she was armed with a semiautomatic weapon and was driving one of three vehicles that "cornered" and rammed the CBP agents' vehicles.
Describing the incident as "really strange," Noem alleged that before the shooting, a caravan of 10 vehicles was following the CBP agents and officers through the streets of Chicago.
"They had followed them and gotten them cornered, pinned them down and then our agents, when getting out of their cars, they tried to run them over and had semiautomatic handguns on them to where our agents had to protect themselves and shots were fired and an individual ended up in the hospital that was attacking these officers," Noem said in a statement on Sunday.