A patient opened fire inside a busy hospital emergency room in a northern Chicago suburb the night of June 5, striking a security guard, police reported.

The brazen shooting took place in the city of Evanston as the shooting suspect, who police identified as a 28-year-old local man, became agitated toward a hospital worker while being admitted, Evanston Police Department Comd. Scott Sophier said in a news release.

The suspect, Sophier said, began shooting inside the ER of Endeavor Health Evanston Hospital .

Evanston is in Cook County, just over 15 miles north of downtown Chicago.

No other injuries were reported.

"The security officer who was shot was last reported to be in stable condition with non-life-threatening injuries," Sophier said, adding that he did not have a timeline on t

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