PHILADELPHIA (CBS) — Police say an examination on a boy who died early yesterday morning revealed that he suffered a large laceration to his liver, bruising on his chest wall, a bruised ear and an abrasion over his eye.

Authorities say two-year-old Zyair Worrell also tested positive for THC.

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Police responded to the scene late Tuesday night following the report of a “hospital case” on the 600 block of E. Clementine Street in Kensington.

Upon arrival, they observed a 23-year-old female holding Zyair, who appeared to be lethargic.

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Police say the woman identified herself as his mother. Her 21-year-old boyfriend was also present.

Officers took the child to St. Christopher’s Hospital, where he was pronounced dead.

Police say information regarding an arrest will be released soon.

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They say the motivation is child abuse.