CHICAGO (CBS) — A man is dead after being shot in the back in a Park Manor neighborhood apartment.

The shooting happened just before 4:30 p.m. in an apartment in the building at 7854 S. Ellis Ave., police said.

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The victim – identified as David Harris, 45 – was inside the apartment when an unknown offender entered the apartment and shot him twice in the back, police said.

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Harris, of Evanston, was pronounced dead at the scene, police said. The offender remained at large Wednesday evening.

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Area South detectives were investigating Wednesday night.