CHICAGO - Two people are facing charges in connection with the use of cars to ram and block federal agents on Chicago’s Southwest Side on Saturday, which led to a shooting.

Federal prosecutors charged Marimar Martinez, 30, and Anthony Ian Santos Ruiz, 21, with forcibly assaulting, impeding, and interfering with a federal law enforcement officer, according to the U.S. Attorney’s Office in the Northern District of Illinois.

What we know:

Prosecutors said federal agents had conducted an operation on Saturday and Border Patrol agents acting as security detail were followed by a "convoy" of cars.

Prosecutors allege that civilian cars began to follow the agents near Oak Lawn and were driving "aggressively and erratically," sometimes coming very close to the agents' car, disregarding red

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