Chicago police officers are mourning after one of their own was killed in the line of duty Wednesday.

Officer Andres Vasquez-Lasso, 32, was shot and killed as he chased a teenaged armed suspect who suddenly turned and fired "at close range" in Gage Park, FOX 32 reports.

The incident began to unfold around 4:45 p.m. when two police cars responded to a domestic-related call in the 5200 block of South Spaulding Avenue. A caller said a suspect was chasing a female with a gun, Police Superintendent David O. Brown told reporters.

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