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CHICAGO, Illinois ( WBBM ) -- A 5-year-old boy is dead after he accessed an unsecured gun inside an apartment on Chicago's South Side on Sunday afternoon.

The shooting happened around 1:17 p.m. in the 4400 block of South Greenwood Avenue in the Kenwood neighborhood.

Police were called to the apartment complex after the boy suffered a gunshot wound to the head inside an apartment. A police source told CBS News Chicago the boy accidentally shot himself.

He was taken to Comer Children's Hospital, where he was in critical condition and later died.

The family told a gun victim's advocate that the boy started kindergarten just last week. A gun was recovered at the scene.

"This one in particular is tragic, sudden, family in shock, just shocking to us a

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