NEW YORK (CBSNewYork/AP) — The New York City medical examiner says the 9-month-old baby boy left in the care of a teenager died from blunt impact injuries.

Ryan Ferrer’s death was ruled a homicide Wednesday. The medical examiner’s office also says he suffered bleeding in his brain and his internal organs were bruised and cut.

Authorities say 17-year-old Martin Quirindongo was babysitting the infant Tuesday morning while the mother was at work. Police responded to a 911 call, saying the child was unconscious when they arrived at the apartment located at the Marble Hill Houses housing project. The baby later died at a hospital.

Police have arrested Quirindongo and charged him with murder and manslaughter. The baby was of a healthy height and weight when he died.

(TM and Copyright 2011 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2011 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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