A Pennsylvania boy was killed Wednesday in his North Philadelphia home when he fell on a piece of glass from a broken picture frame, authorities said.

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The 4-year-old was impaled in the abdomen by the glass and died at an area hospital, WCAU-TV reported.

The boy was at home with his mother and other family members when the accident happened on the second floor of the house.

The boy’s death is under investigation and the family is said to be cooperating with police.