PITTSBURGH (AP) – Two teen residents of a Pittsburgh group home have now been charged with criminal homicide in the assault of a third resident, a 16-year-old boy.

The Allegheny County medical examiner’s office on Thursday ruled Nicholas Grant’s death a homicide, after determining he died from a lack of oxygen caused by having his neck squeezed. Grant died days after Saturday night’s attack at the Circle C Group Home in the city’s Carrick neighborhood.

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And online court records show police have now charged a 15-year-old and 16-year-old with criminal homicide, on top of aggravated assault and conspiracy charges they already faced.

The teens were still awaiting arraignment early Friday.

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The defendants are charged as adults, but The Associated Press generally does not identify minors charged with crimes. Court records don’t list defense attorneys.

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