Dominick Andujor, 6, was killed as he slept inside his Camden home early Sunday morning.
A suspect is in police custody and charged with the throat slashing attack on a little boy and his sister Sunday morning in Camden, New Jersey, according to the Camden County Prosecutor's Office.
Two other children in the home were not hurt.
The little boy, 6, died from his injuries. His 12-year-old sister is in critical condition at Cooper Hospital.
The children were attacked in their home early Sunday morning at their home on the 900 block of Ware Street just after 2 a.m.
The girl, whose name was not released, went door-to-door in her Camden neighborhood to get help and finally reached the home of Nakyta McCray, who called 911. McCray said the girl "was barely breathing'' and bleeding profusely when emergency personnel arrived.
The boy's father lives out of state, authorities said, and his mother was in the hospital at the time. The children were being cared for by their 14-year-old sister. Another sister, 9, was also home at the time.
The little boy died at the scene. His injured sister was taken to Cooper Hospital.
Police and the prosecutor's office have not yet released any details about the suspect or what led to the arrest.
NBC10 crews are working to gather more information about this major break in the case.